Benchmark LDPC Encoder #1423

mirazabal · 2025-11-20T19:42:45Z

mirazabal
Nov 20, 2025

Hi all,
According to my understanding, when encoding in srsRAN, the function encode (i.e., ldpc_encoder_impl.cpp:44), does not encode the full codeword, but rather the first 4 Zc after systematic bits. The rest of the bits are only encoded when the function write_codeblock is called. I understand the optimization goal (i.e., to avoid moving the bits later in the rate matcher), but, wouldn't it be more fair to add the write_codeblock call into the benchmark?

Answered by dvdgrgrtt

Dec 3, 2025

Hi @mirazabal,
thanks for the report! I have to admit I didn't expect such a difference. I only have one suggestion - instead of std::vector<uint8_t> tmp(max_cb_length_bg*ls), I'd do std::vector<uint8_t> tmp(cb_length), so you can compare the bit-rate (or encoding time) for different codeblock lengths - right now, you're always writing the whole codeblock, that's why you get the same result for each two consecutive lines. Recall that, in NR, you'll need more or less redundancy bits depending on the redundancy version and the MCS (this was one of the reasons for separating the high-rate region from the rest), and, in my opinion, it's interesting to know at least the two extreme values. Of …

View full answer

dvdgrgrtt · 2025-12-02T15:47:34Z

dvdgrgrtt
Dec 2, 2025
Maintainer

Hi @mirazabal,
thanks for pointing this out - we probably forgot to update the benchmark when we optimized the encoder and split write_codeblock from encode.

If you want to be exact, yes, you should include write_codeblock in the benchmark. However, computing the systematic bits after the high-rate section (the first 4 Zc systematic bits) is much less computationally expensive than the high-rate section itself, so my guess is that you won't see a significant difference. If you try it out, let us know!

3 replies

mirazabal Dec 2, 2025
Author

Hi @dvdgrgrtt . Thanks for the reply. Here my measurements:

Vanilla

./build/tests/benchmarks/phy/upper/channel_coding/ldpc/ldpc_encoder_benchmark -T avx2 -R 10000
"LDPC encoder avx2" performance for 10000 repetitions. All values are in megabits per second.
Percentiles: | 50th | 75th | 90th | 99th | 99.9th |99.99th | Worst |
BG=1 LS=2 cb_len=48 | 42.2| 42.2| 36.8| 16.7| 6.3| 1.3| 1.3|
BG=1 LS=2 cb_len=132 | 42.6| 42.2| 41.8| 33.7| 7.9| 5.0| 5.0|
BG=1 LS=3 cb_len=72 | 59.3| 59.2| 58.3| 57.2| 14.1| 9.8| 9.8|
BG=1 LS=3 cb_len=198 | 59.3| 59.2| 58.8| 58.3| 14.2| 10.4| 10.4|
BG=1 LS=4 cb_len=96 | 79.0| 78.4| 77.7| 77.0| 16.5| 0.3| 0.3|
BG=1 LS=4 cb_len=264 | 79.1| 78.4| 68.1| 31.2| 14.4| 0.2| 0.2|
BG=1 LS=5 cb_len=120 | 93.0| 92.2| 92.2| 90.7| 19.3| 15.7| 15.7|
BG=1 LS=5 cb_len=330 | 93.0| 93.0| 92.2| 65.7| 19.1| 5.5| 5.5|
BG=1 LS=6 cb_len=144 | 108.9| 108.0| 107.9| 107.0| 23.2| 17.9| 17.9|
BG=1 LS=6 cb_len=396 | 108.8| 108.0| 107.1| 106.1| 23.6| 15.3| 15.3|
BG=1 LS=7 cb_len=168 | 123.9| 123.8| 123.0| 113.0| 25.9| 13.7| 13.7|
BG=1 LS=7 cb_len=462 | 123.9| 123.8| 123.0| 122.9| 27.1| 24.5| 24.5|
BG=1 LS=8 cb_len=192 | 156.8| 155.4| 154.1| 152.6| 33.4| 2.2| 2.2|
BG=1 LS=8 cb_len=528 | 155.4| 154.1| 152.7| 151.4| 31.4| 28.7| 28.7|
BG=1 LS=9 cb_len=216 | 155.6| 155.5| 154.3| 153.1| 33.8| 26.1| 26.1|
BG=1 LS=9 cb_len=594 | 156.8| 155.6| 154.4| 105.1| 33.4| 14.7| 14.7|
BG=1 LS=10 cb_len=240 | 175.7| 174.3| 171.6| 134.7| 33.2| 2.1| 2.1|
BG=1 LS=10 cb_len=660 | 176.9| 175.7| 174.3| 171.4| 37.5| 31.5| 31.5|
BG=1 LS=11 cb_len=264 | 190.1| 188.7| 187.3| 185.7| 41.7| 36.5| 36.5|
BG=1 LS=11 cb_len=726 | 187.3| 187.1| 185.7| 184.3| 42.0| 38.4| 38.4|
BG=1 LS=12 cb_len=288 | 214.2| 214.1| 212.5| 212.3| 45.2| 10.0| 10.0|
BG=1 LS=12 cb_len=792 | 216.0| 216.0| 214.2| 212.5| 45.8| 26.3| 26.3|
BG=1 LS=13 cb_len=312 | 224.8| 224.6| 221.3| 219.4| 49.4| 46.2| 46.2|
BG=1 LS=13 cb_len=858 | 223.0| 221.3| 219.6| 219.4| 49.9| 19.5| 19.5|
BG=1 LS=14 cb_len=336 | 240.2| 238.3| 238.2| 172.7| 53.1| 36.7| 36.7|
BG=1 LS=14 cb_len=924 | 238.3| 238.2| 236.3| 169.8| 51.0| 18.5| 18.5|
BG=1 LS=15 cb_len=360 | 251.3| 249.6| 249.4| 245.7| 56.2| 46.6| 46.6|
BG=1 LS=15 cb_len=990 | 255.4| 255.2| 253.4| 251.5| 59.6| 51.6| 51.6|
BG=1 LS=16 cb_len=384 | 297.8| 297.5| 295.3| 292.8| 64.7| 55.3| 55.3|
BG=1 LS=16 cb_len=1056 | 300.3| 297.8| 295.3| 292.8| 72.7| 50.3| 50.3|
BG=1 LS=18 cb_len=432 | 306.5| 306.2| 304.1| 299.5| 67.4| 20.2| 20.2|
BG=1 LS=18 cb_len=1188 | 308.6| 306.5| 306.2| 51.7| 36.1| 8.2| 8.2|
BG=1 LS=20 cb_len=480 | 345.9| 345.6| 342.9| 332.5| 82.8| 56.2| 56.2|
BG=1 LS=20 cb_len=1320 | 348.3| 345.9| 343.2| 340.2| 93.2| 62.7| 62.7|
BG=1 LS=22 cb_len=528 | 365.8| 363.0| 360.6| 357.9| 81.0| 54.7| 54.7|
BG=1 LS=22 cb_len=1452 | 368.9| 368.6| 365.8| 357.7| 83.8| 19.2| 19.2|
BG=1 LS=24 cb_len=576 | 439.2| 438.9| 435.6| 415.0| 93.1| 73.0| 73.0|
BG=1 LS=24 cb_len=1584 | 439.2| 435.6| 432.0| 73.8| 65.3| 8.6| 8.6|
BG=1 LS=26 cb_len=624 | 432.6| 432.3| 429.4| 425.9| 94.5| 48.5| 48.5|
BG=1 LS=26 cb_len=1716 | 438.9| 435.6| 432.6| 429.1| 104.3| 67.0| 67.0|
BG=1 LS=28 cb_len=672 | 476.4| 473.1| 472.7| 469.1| 113.4| 81.4| 81.4|
BG=1 LS=28 cb_len=1848 | 476.4| 473.1| 469.5| 465.6| 102.6| 81.7| 81.7|
BG=1 LS=30 cb_len=720 | 487.8| 484.5| 484.2| 473.7| 116.1| 71.3| 71.3|
BG=1 LS=30 cb_len=1980 | 491.4| 487.8| 484.5| 480.6| 114.3| 91.2| 91.2|
BG=1 LS=32 cb_len=768 | 627.4| 627.4| 621.9| 615.9| 127.9| 79.0| 79.0|
BG=1 LS=32 cb_len=2112 | 626.8| 616.4| 611.1| 104.4| 102.8| 22.2| 22.2|
BG=1 LS=36 cb_len=864 | 642.3| 627.0| 617.3| 467.8| 137.2| 91.7| 91.7|
BG=1 LS=36 cb_len=2376 | 637.6| 637.6| 632.5| 617.7| 134.4| 81.8| 81.8|
BG=1 LS=40 cb_len=960 | 744.5| 738.2| 737.6| 720.1| 428.4| 68.8| 68.8|
BG=1 LS=40 cb_len=2640 | 738.2| 731.5| 720.1| 707.9| 152.2| 19.9| 19.9|
BG=1 LS=44 cb_len=1056 | 760.4| 754.4| 737.8| 731.6| 176.3| 136.6| 136.6|
BG=1 LS=44 cb_len=2904 | 754.4| 749.2| 737.8| 721.3| 166.0| 126.1| 126.1|
BG=1 LS=48 cb_len=1152 | 878.5| 878.5| 871.2| 850.2| 186.9| 159.9| 159.9|
BG=1 LS=48 cb_len=3168 | 878.5| 877.8| 864.1| 843.4| 190.2| 158.7| 158.7|
BG=1 LS=52 cb_len=1248 | 878.6| 871.9| 865.3| 858.2| 195.5| 134.0| 134.0|
BG=1 LS=52 cb_len=3432 | 884.7| 877.9| 865.3| 851.8| 195.2| 50.3| 50.3|
BG=1 LS=56 cb_len=1344 | 991.1| 984.0| 976.2| 952.8| 210.5| 186.6| 186.6|
BG=1 LS=56 cb_len=3696 | 991.9| 984.0| 967.7| 814.2| 223.1| 161.3| 161.3|
BG=1 LS=60 cb_len=1440 | 990.2| 976.3| 961.3| 940.8| 223.6| 67.8| 67.8|
BG=1 LS=60 cb_len=3960 | 983.6| 976.3| 968.4| 947.5| 223.3| 147.2| 147.2|
BG=1 LS=64 cb_len=1536 | 1254.9| 1222.2| 1211.7| 1033.7| 258.3| 133.3| 133.3|
BG=1 LS=64 cb_len=4224 | 1254.9| 1222.2| 1211.7| 1201.3| 300.2| 211.3| 211.3|
BG=1 LS=72 cb_len=1728 | 1189.1| 1179.4| 1162.1| 1129.8| 286.9| 216.5| 216.5|
BG=1 LS=72 cb_len=4752 | 1207.3| 1197.2| 1188.2| 1145.3| 272.1| 201.1| 201.1|
BG=1 LS=80 cb_len=1920 | 1236.8| 1211.2| 1194.8| 1170.9| 294.2| 83.7| 83.7|
BG=1 LS=80 cb_len=5280 | 1281.8| 1254.4| 1228.1| 1203.0| 300.8| 267.8| 267.8|
BG=1 LS=88 cb_len=2112 | 1314.3| 1296.7| 1279.5| 1230.7| 324.2| 110.2| 110.2|
BG=1 LS=88 cb_len=5808 | 1389.8| 1371.1| 1361.4| 1341.6| 325.3| 154.3| 154.3|
BG=1 LS=96 cb_len=2304 | 1849.3| 1699.1| 1634.6| 1527.1| 435.5| 292.3| 292.3|
BG=1 LS=96 cb_len=6336 | 2268.5| 2172.8| 2066.5| 1700.4| 560.6| 371.8| 371.8|
BG=1 LS=104 cb_len=2496 | 2688.6| 2654.2| 2594.1| 2539.4| 1289.7| 386.4| 386.4|
BG=1 LS=104 cb_len=6864 | 2685.4| 2657.3| 2654.2| 2623.8| 1320.2| 427.6| 427.6|
BG=1 LS=112 cb_len=2688 | 2734.7| 2731.7| 2701.7| 2672.4| 1344.2| 563.9| 563.9|
BG=1 LS=112 cb_len=7392 | 2762.3| 2731.7| 2704.7| 2672.4| 1719.4| 525.5| 525.5|
BG=1 LS=120 cb_len=2880 | 2832.6| 2802.5| 2773.1| 2716.0| 1379.3| 509.7| 509.7|
BG=1 LS=120 cb_len=7920 | 2863.3| 2832.6| 2802.5| 2773.1| 1829.5| 283.3| 283.3|
BG=1 LS=128 cb_len=3072 | 3388.6| 3348.3| 3344.4| 3266.8| 1980.3| 726.3| 726.3|
BG=1 LS=128 cb_len=8448 | 3425.7| 3384.6| 3344.4| 3266.8| 1643.8| 706.1| 706.1|
BG=1 LS=144 cb_len=3456 | 3193.5| 3069.7| 3011.4| 2823.5| 930.1| 570.7| 570.7|
BG=1 LS=144 cb_len=9504 | 3293.1| 3226.0| 3099.8| 2590.3| 1050.7| 611.5| 611.5|
BG=1 LS=160 cb_len=3840 | 3697.4| 3625.1| 3584.5| 3512.9| 1774.1| 838.4| 838.4|
BG=1 LS=160 cb_len=10560| 3621.3| 3584.5| 3548.3| 3444.2| 1801.4| 876.2| 876.2|
BG=1 LS=176 cb_len=4224 | 3788.6| 3751.9| 3645.9| 3545.7| 1797.5| 288.8| 288.8|
BG=1 LS=176 cb_len=11616| 3788.6| 3751.9| 3715.9| 3611.9| 998.7| 911.4| 911.4|
BG=1 LS=192 cb_len=4608 | 4350.1| 4301.4| 4258.0| 4173.9| 1097.9| 992.0| 992.0|
BG=1 LS=192 cb_len=12672| 4305.8| 4258.0| 4215.5| 4133.0| 1155.0| 889.4| 889.4|
BG=1 LS=208 cb_len=4992 | 4152.4| 4111.4| 4042.4| 3938.0| 1133.5| 961.5| 961.5|
BG=1 LS=208 cb_len=13728| 4229.2| 4152.4| 4115.1| 3744.6| 299.1| 131.2| 131.2|
BG=1 LS=224 cb_len=5376 | 4471.8| 4392.1| 4315.2| 4134.2| 1393.2| 989.7| 989.7|
BG=1 LS=224 cb_len=14784| 4512.8| 4467.8| 4388.2| 4201.1| 1236.0| 1125.3| 1125.3|
BG=1 LS=240 cb_len=5760 | 4705.8| 4623.4| 4543.8| 4429.5| 1294.7| 618.5| 618.5|
BG=1 LS=240 cb_len=15840| 4583.3| 4505.1| 4392.6| 4217.2| 1307.9| 844.6| 844.6|
BG=1 LS=256 cb_len=6144 | 5353.6| 5303.2| 5205.1| 5110.7| 1434.1| 1066.6| 1066.6|
BG=1 LS=256 cb_len=16896| 5303.2| 5253.7| 5157.5| 5019.6| 1483.2| 387.9| 387.9|
BG=1 LS=288 cb_len=6912 | 5180.7| 5097.3| 5016.6| 4866.3| 1531.1| 1447.2| 1447.2|
BG=1 LS=288 cb_len=19008| 5184.9| 5101.4| 5020.6| 4866.3| 1531.1| 1418.0| 1418.0|
BG=1 LS=320 cb_len=7680 | 5623.0| 5407.0| 5165.0| 620.7| 598.5| 159.8| 159.8|
BG=1 LS=320 cb_len=21120| 5623.0| 5491.4| 5365.8| 4504.1| 1485.5| 1058.3| 1058.3|
BG=1 LS=352 cb_len=8448 | 5723.5| 5640.2| 5559.2| 5329.6| 1676.5| 520.8| 520.8|
BG=1 LS=352 cb_len=23232| 5853.3| 5766.1| 5681.5| 5484.4| 1717.8| 195.3| 195.3|
BG=1 LS=384 cb_len=9216 | 6021.3| 5818.1| 5658.4| 5336.7| 1956.4| 1749.4| 1749.4|
BG=1 LS=384 cb_len=25344| 6064.6| 5936.7| 5814.1| 5583.6| 1979.3| 1650.3| 1650.3|
BG=2 LS=2 cb_len=24 | 68.7| 68.7| 66.4| 66.4| 33.8| 5.7| 5.7|
BG=2 LS=2 cb_len=100 | 68.7| 68.7| 68.7| 66.4| 34.4| 4.3| 4.3|
BG=2 LS=3 cb_len=36 | 96.7| 96.4| 96.4| 93.4| 93.4| 9.2| 9.2|
BG=2 LS=3 cb_len=150 | 99.6| 96.7| 96.4| 96.4| 49.0| 9.2| 9.2|
BG=2 LS=4 cb_len=48 | 128.6| 125.0| 124.6| 120.8| 61.4| 4.8| 4.8|
BG=2 LS=4 cb_len=200 | 125.0| 124.6| 121.2| 107.8| 60.5| 9.7| 9.7|
BG=2 LS=5 cb_len=60 | 151.0| 151.0| 147.0| 146.6| 74.5| 10.3| 10.3|
BG=2 LS=5 cb_len=250 | 151.0| 151.0| 147.0| 146.6| 95.9| 14.8| 14.8|
BG=2 LS=6 cb_len=72 | 181.2| 175.9| 175.9| 175.9| 89.2| 17.1| 17.1|
BG=2 LS=6 cb_len=300 | 176.4| 175.9| 175.9| 170.9| 88.1| 16.2| 16.2|
BG=2 LS=7 cb_len=84 | 199.4| 199.4| 199.4| 193.9| 129.3| 20.4| 20.4|
BG=2 LS=7 cb_len=350 | 194.4| 170.3| 151.8| 122.5| 5.6| 5.6| 5.6|
BG=2 LS=8 cb_len=96 | 249.2| 249.2| 241.6| 181.4| 145.1| 12.3| 12.3|
BG=2 LS=8 cb_len=400 | 249.2| 249.2| 241.6| 241.6| 124.6| 17.5| 17.5|
BG=2 LS=9 cb_len=108 | 249.3| 243.2| 242.5| 242.5| 122.9| 21.0| 21.0|
BG=2 LS=9 cb_len=450 | 243.2| 242.5| 242.5| 236.2| 121.4| 22.5| 22.5|
BG=2 LS=10 cb_len=120 | 284.9| 277.0| 277.0| 277.0| 269.5| 25.9| 25.9|
BG=2 LS=10 cb_len=500 | 277.7| 277.0| 249.3| 181.4| 138.5| 14.5| 14.5|
BG=2 LS=11 cb_len=132 | 305.5| 304.7| 304.7| 296.4| 152.5| 19.1| 19.1|
BG=2 LS=11 cb_len=550 | 313.3| 304.7| 304.7| 304.7| 296.4| 17.2| 17.2|
BG=2 LS=12 cb_len=144 | 351.9| 351.9| 342.8| 341.8| 332.4| 33.7| 33.7|
BG=2 LS=12 cb_len=600 | 341.8| 341.8| 341.8| 332.4| 173.4| 6.4| 6.4|
BG=2 LS=13 cb_len=156 | 360.1| 351.3| 350.4| 350.4| 177.5| 31.0| 31.0|
BG=2 LS=13 cb_len=650 | 360.1| 360.1| 360.1| 350.4| 182.8| 37.8| 37.8|
BG=2 LS=14 cb_len=168 | 387.8| 387.8| 377.3| 367.4| 186.4| 6.8| 6.8|
BG=2 LS=14 cb_len=700 | 387.8| 378.3| 377.3| 340.6| 194.1| 31.9| 31.9|
BG=2 LS=15 cb_len=180 | 405.4| 404.3| 393.7| 383.6| 204.9| 35.1| 35.1|
BG=2 LS=15 cb_len=750 | 405.4| 404.3| 404.3| 393.7| 199.7| 41.3| 41.3|
BG=2 LS=16 cb_len=192 | 498.4| 483.3| 483.3| 469.2| 242.0| 48.6| 48.6|
BG=2 LS=16 cb_len=800 | 498.4| 483.3| 483.3| 469.2| 245.3| 37.3| 37.3|
BG=2 LS=18 cb_len=216 | 486.4| 485.1| 485.1| 472.4| 242.9| 48.9| 48.9|
BG=2 LS=18 cb_len=900 | 486.4| 485.1| 485.1| 472.4| 242.5| 43.8| 43.8|
BG=2 LS=20 cb_len=240 | 569.8| 554.0| 554.0| 539.0| 273.5| 47.8| 47.8|
BG=2 LS=20 cb_len=1000 | 569.8| 555.5| 554.0| 540.5| 277.0| 56.7| 56.7|
BG=2 LS=22 cb_len=264 | 578.9| 577.4| 577.4| 457.3| 289.0| 41.5| 41.5|
BG=2 LS=22 cb_len=1100 | 548.6| 535.2| 487.8| 64.5| 45.2| 5.7| 5.7|
BG=2 LS=24 cb_len=288 | 703.8| 703.8| 685.7| 683.7| 351.9| 60.1| 60.1|
BG=2 LS=24 cb_len=1200 | 703.8| 703.8| 703.8| 683.7| 347.3| 32.7| 32.7|
BG=2 LS=26 cb_len=312 | 682.4| 682.4| 664.9| 664.9| 345.7| 68.8| 68.8|
BG=2 LS=26 cb_len=1300 | 700.8| 700.8| 682.4| 682.4| 664.9| 72.3| 72.3|
BG=2 LS=28 cb_len=336 | 775.6| 775.6| 754.7| 754.7| 734.9| 77.6| 77.6|
BG=2 LS=28 cb_len=1400 | 756.7| 754.7| 754.7| 754.7| 734.9| 15.4| 15.4|
BG=2 LS=30 cb_len=360 | 787.4| 767.2| 750.0| 748.1| 384.1| 74.4| 74.4|
BG=2 LS=30 cb_len=1500 | 789.4| 787.4| 787.4| 787.4| 750.0| 57.8| 57.8|
BG=2 LS=32 cb_len=384 | 1028.9| 1028.9| 996.8| 966.7| 938.4| 88.7| 88.7|
BG=2 LS=32 cb_len=1600 | 1028.9| 996.8| 996.8| 966.7| 938.4| 53.7| 53.7|
BG=2 LS=36 cb_len=432 | 947.3| 944.8| 920.7| 875.9| 460.9| 88.0| 88.0|
BG=2 LS=36 cb_len=1800 | 1025.6| 1000.0| 997.2| 947.3| 920.7| 88.0| 88.0|
BG=2 LS=40 cb_len=480 | 1052.6| 1049.8| 997.5| 973.2| 498.7| 113.7| 113.7|
BG=2 LS=40 cb_len=2000 | 1078.1| 1052.6| 1049.8| 997.5| 928.0| 110.3| 110.3|
BG=2 LS=44 cb_len=528 | 1218.8| 1218.8| 1218.8| 1125.3| 601.9| 120.6| 120.6|
BG=2 LS=44 cb_len=2200 | 1189.1| 1185.9| 1154.8| 1097.2| 593.7| 56.0| 56.0|
BG=2 LS=48 cb_len=576 | 1407.6| 1367.5| 1297.2| 1293.8| 1142.8| 137.6| 137.6|
BG=2 LS=48 cb_len=2400 | 1329.6| 1167.8| 960.0| 148.3| 127.7| 11.8| 11.8|
BG=2 LS=52 cb_len=624 | 1333.3| 1296.7| 1265.2| 926.9| 641.1| 94.0| 94.0|
BG=2 LS=52 cb_len=2600 | 1364.8| 1329.9| 1296.7| 1235.1| 625.7| 93.3| 93.3|
BG=2 LS=56 cb_len=672 | 1551.2| 1509.4| 1432.2| 1396.5| 734.9| 40.0| 40.0|
BG=2 LS=56 cb_len=2800 | 1551.2| 1509.4| 1435.8| 1035.1| 734.9| 85.3| 85.3|
BG=2 LS=60 cb_len=720 | 1534.5| 1496.2| 1425.1| 1069.5| 705.0| 61.8| 61.8|
BG=2 LS=60 cb_len=3000 | 1500.0| 1428.5| 1425.1| 1392.1| 712.5| 128.5| 128.5|
BG=2 LS=64 cb_len=768 | 1939.3| 1933.5| 1876.8| 1772.8| 939.7| 158.5| 158.5|
BG=2 LS=64 cb_len=3200 | 1993.7| 1993.7| 1933.5| 1823.3| 983.1| 183.5| 183.5|
BG=2 LS=72 cb_len=864 | 1889.7| 1800.0| 1795.5| 1710.2| 944.8| 191.6| 191.6|
BG=2 LS=72 cb_len=3600 | 1889.7| 1800.0| 1795.5| 1355.9| 1141.0| 152.2| 152.2|
BG=2 LS=80 cb_len=960 | 2046.0| 1951.2| 1946.4| 1814.0| 986.4| 225.6| 225.6|
BG=2 LS=80 cb_len=4000 | 2051.2| 1995.0| 1946.4| 1814.0| 1773.8| 211.2| 211.2|
BG=2 LS=88 cb_len=1056 | 2250.6| 2194.5| 2090.2| 2041.7| 1995.4| 232.3| 232.3|
BG=2 LS=88 cb_len=4400 | 2194.5| 2141.1| 2090.2| 2041.7| 1111.1| 199.1| 199.1|
BG=2 LS=96 cb_len=1152 | 2519.6| 2455.2| 2394.0| 1916.1| 1212.1| 57.0| 57.0|
BG=2 LS=96 cb_len=4800 | 2587.6| 2461.5| 2394.0| 2335.7| 1955.1| 266.1| 266.1|
BG=2 LS=104 cb_len=1248 | 2476.1| 2470.3| 2470.3| 2358.2| 2255.9| 188.4| 188.4|
BG=2 LS=104 cb_len=5200 | 2476.1| 2412.9| 2358.2| 2305.9| 1887.4| 150.2| 150.2|
BG=2 LS=112 cb_len=1344 | 2598.6| 2539.6| 2483.3| 1863.5| 1241.6| 260.5| 260.5|
BG=2 LS=112 cb_len=5600 | 2660.3| 2545.4| 2539.6| 2483.3| 1284.4| 174.6| 174.6|
BG=2 LS=120 cb_len=1440 | 2660.7| 2603.0| 2603.0| 2494.8| 2443.9| 297.9| 297.9|
BG=2 LS=120 cb_len=6000 | 2721.0| 2660.7| 2603.0| 2547.7| 2443.9| 338.4| 338.4|
BG=2 LS=128 cb_len=1536 | 3273.6| 3114.3| 3040.3| 2969.8| 1388.2| 358.8| 358.8|
BG=2 LS=128 cb_len=6400 | 3192.0| 3114.3| 2976.7| 2365.9| 1538.4| 328.4| 328.4|
BG=2 LS=144 cb_len=1728 | 3200.0| 3192.9| 3123.6| 2993.7| 1561.8| 344.6| 344.6|
BG=2 LS=144 cb_len=7200 | 3123.6| 3057.3| 2993.7| 2818.0| 1409.0| 266.6| 266.6|
BG=2 LS=160 cb_len=1920 | 3547.6| 3470.7| 3333.3| 3193.6| 1680.6| 344.9| 344.9|
BG=2 LS=160 cb_len=8000 | 3547.6| 3470.7| 3397.0| 2614.3| 1756.3| 397.3| 397.3|
BG=2 LS=176 cb_len=2112 | 3591.8| 3512.9| 3444.2| 3314.5| 1792.2| 464.7| 464.7|
BG=2 LS=176 cb_len=8800 | 3659.0| 3584.5| 3512.9| 3378.1| 3253.2| 407.5| 407.5|
BG=2 LS=192 cb_len=2304 | 4164.8| 4076.4| 3991.6| 3832.3| 1995.8| 392.7| 392.7|
BG=2 LS=192 cb_len=9600 | 4257.2| 4085.1| 4076.4| 3910.3| 2062.2| 501.6| 501.6|
BG=2 LS=208 cb_len=2496 | 3917.1| 3844.7| 3768.1| 2884.8| 1904.7| 372.7| 372.7|
BG=2 LS=208 cb_len=10400| 3844.7| 3707.6| 3580.0| 3404.2| 1904.7| 390.2| 390.2|
BG=2 LS=224 cb_len=2688 | 3992.8| 3922.9| 3790.1| 3666.1| 1942.7| 382.1| 382.1|
BG=2 LS=224 cb_len=11200| 3992.8| 3855.4| 3790.1| 3241.6| 2051.2| 513.9| 513.9|
BG=2 LS=240 cb_len=2880 | 4195.8| 4060.9| 3993.3| 3864.7| 2063.6| 391.3| 391.3|
BG=2 LS=240 cb_len=12000| 4278.0| 4203.1| 4060.9| 3864.7| 2083.3| 601.8| 601.8|
BG=2 LS=256 cb_len=3072 | 4923.0| 4821.0| 4731.9| 4483.3| 2323.0| 698.1| 698.1|
BG=2 LS=256 cb_len=12800| 4821.0| 4731.9| 4646.0| 3651.9| 2388.0| 154.9| 154.9|
BG=2 LS=288 cb_len=3456 | 4713.5| 4637.6| 4492.9| 4350.4| 2282.0| 779.0| 779.0|
BG=2 LS=288 cb_len=14400| 4873.0| 4792.0| 4713.5| 4492.9| 2434.4| 798.4| 798.4|
BG=2 LS=320 cb_len=3840 | 5507.7| 5414.5| 5237.3| 4150.4| 2707.2| 757.0| 757.0|
BG=2 LS=320 cb_len=16000| 5507.7| 5405.4| 5237.3| 4992.1| 2662.2| 444.2| 444.2|
BG=2 LS=352 cb_len=4224 | 5761.0| 5578.4| 5482.8| 5161.2| 2767.2| 760.4| 760.4|
BG=2 LS=352 cb_len=17600| 5856.9| 5668.2| 5569.6| 5245.9| 2880.5| 910.2| 910.2|
BG=2 LS=384 cb_len=4608 | 6183.5| 5981.3| 5800.6| 4794.0| 2992.9| 345.6| 345.6|
BG=2 LS=384 cb_len=19200| 6274.5| 6085.5| 5898.6| 5557.1| 2926.8| 963.1| 963.1|

After applying the following diff

+#include "srsran/phy/upper/channel_coding/ldpc/ldpc_encoder_buffer.h"
#include "srsran/phy/upper/channel_coding/channel_coding_factories.h"
#include "srsran/support/benchmark_utils.h"
#include "srsran/support/srsran_test.h"
@@ -111,9 +112,22 @@ int main(int argc, char** argv)
fmt::underlying(ls),
cb_length);

+        std::vector<uint8_t> tmp(max_cb_length_bg*ls);
         perf_meas_generic.new_measure(to_string(descr_buffer), data.size(), [&]() {
           const ldpc_encoder_buffer& rm_buffer = encoder->encode(data, cfg_enc);
+          rm_buffer.write_codeblock(tmp, 0);
           do_not_optimize(&rm_buffer);

./build/tests/benchmarks/phy/upper/channel_coding/ldpc/ldpc_encoder_benchmark -T avx2 -R 10000
"LDPC encoder avx2" performance for 10000 repetitions. All values are in megabits per second.
Percentiles: | 50th | 75th | 90th | 99th | 99.9th |99.99th | Worst |
BG=1 LS=2 cb_len=48 | 10.6| 10.6| 10.5| 8.9| 1.5| 1.0| 1.0|
BG=1 LS=2 cb_len=132 | 10.6| 10.6| 10.6| 4.9| 3.7| 0.8| 0.8|
BG=1 LS=3 cb_len=72 | 15.6| 15.5| 15.5| 14.2| 6.9| 1.4| 1.4|
BG=1 LS=3 cb_len=198 | 15.6| 15.5| 15.4| 12.5| 5.7| 2.3| 2.3|
BG=1 LS=4 cb_len=96 | 20.7| 20.6| 20.5| 18.0| 9.5| 4.3| 4.3|
BG=1 LS=4 cb_len=264 | 20.8| 20.7| 20.6| 17.3| 8.4| 2.4| 2.4|
BG=1 LS=5 cb_len=120 | 25.5| 25.5| 25.4| 10.2| 9.5| 0.6| 0.6|
BG=1 LS=5 cb_len=330 | 25.5| 25.4| 25.4| 25.2| 12.0| 2.0| 2.0|
BG=1 LS=6 cb_len=144 | 30.6| 30.4| 30.2| 30.1| 13.4| 0.1| 0.1|
BG=1 LS=6 cb_len=396 | 30.6| 30.4| 30.4| 30.2| 14.2| 9.3| 9.3|
BG=1 LS=7 cb_len=168 | 35.3| 35.1| 35.0| 30.1| 5.9| 0.9| 0.9|
BG=1 LS=7 cb_len=462 | 35.2| 35.1| 35.0| 34.7| 16.5| 9.4| 9.4|
BG=1 LS=8 cb_len=192 | 36.4| 36.2| 36.1| 34.3| 7.9| 3.8| 3.8|
BG=1 LS=8 cb_len=528 | 36.3| 36.2| 36.1| 19.3| 6.0| 2.7| 2.7|
BG=1 LS=9 cb_len=216 | 45.2| 45.1| 44.9| 44.6| 20.9| 4.1| 4.1|
BG=1 LS=9 cb_len=594 | 52.0| 45.3| 45.1| 44.7| 22.3| 1.9| 1.9|
BG=1 LS=10 cb_len=240 | 78.9| 78.6| 78.1| 77.0| 37.8| 19.6| 19.6|
BG=1 LS=10 cb_len=660 | 78.1| 77.8| 77.5| 67.7| 34.8| 29.0| 29.0|
BG=1 LS=11 cb_len=264 | 85.6| 85.0| 84.7| 82.1| 39.7| 24.9| 24.9|
BG=1 LS=11 cb_len=726 | 85.9| 85.3| 84.7| 84.1| 39.9| 12.9| 12.9|
BG=1 LS=12 cb_len=288 | 94.7| 93.7| 93.1| 77.5| 42.1| 12.0| 12.0|
BG=1 LS=12 cb_len=792 | 95.1| 94.1| 93.7| 93.0| 43.7| 15.2| 15.2|
BG=1 LS=13 cb_len=312 | 101.9| 101.5| 100.4| 40.0| 37.3| 4.4| 4.4|
BG=1 LS=13 cb_len=858 | 102.3| 101.5| 100.8| 99.7| 47.8| 40.2| 40.2|
BG=1 LS=14 cb_len=336 | 107.8| 107.5| 107.4| 106.3| 47.2| 5.4| 5.4|
BG=1 LS=14 cb_len=924 | 108.6| 107.8| 107.5| 106.3| 50.4| 18.9| 18.9|
BG=1 LS=15 cb_len=360 | 116.3| 114.7| 114.3| 53.2| 6.0| 0.9| 0.9|
BG=1 LS=15 cb_len=990 | 115.5| 114.7| 114.3| 45.6| 40.1| 5.5| 5.5|
BG=1 LS=16 cb_len=384 | 129.6| 128.2| 127.3| 119.4| 57.9| 22.6| 22.6|
BG=1 LS=16 cb_len=1056 | 130.1| 128.7| 128.2| 127.2| 59.9| 15.2| 15.2|
BG=1 LS=18 cb_len=432 | 140.6| 139.6| 139.1| 136.7| 64.4| 11.3| 11.3|
BG=1 LS=18 cb_len=1188 | 139.1| 138.2| 137.7| 136.7| 63.2| 11.1| 11.1|
BG=1 LS=20 cb_len=480 | 157.3| 155.2| 144.9| 75.4| 16.7| 3.0| 3.0|
BG=1 LS=20 cb_len=1320 | 154.6| 154.1| 153.5| 144.4| 68.6| 51.1| 51.1|
BG=1 LS=22 cb_len=528 | 168.9| 168.3| 167.7| 157.3| 77.6| 37.1| 37.1|
BG=1 LS=22 cb_len=1452 | 171.3| 169.5| 168.2| 160.4| 82.4| 6.1| 6.1|
BG=1 LS=24 cb_len=576 | 193.0| 192.3| 191.6| 189.5| 91.4| 35.8| 35.8|
BG=1 LS=24 cb_len=1584 | 192.9| 191.6| 190.9| 188.2| 91.6| 48.3| 48.3|
BG=1 LS=26 cb_len=624 | 202.4| 200.2| 198.9| 197.5| 93.6| 81.3| 81.3|
BG=1 LS=26 cb_len=1716 | 202.4| 201.0| 199.5| 194.1| 95.3| 25.9| 25.9|
BG=1 LS=28 cb_len=672 | 218.8| 218.0| 217.2| 213.5| 104.7| 86.7| 86.7|
BG=1 LS=28 cb_len=1848 | 217.2| 215.7| 214.2| 89.6| 23.2| 11.2| 11.2|
BG=1 LS=30 cb_len=720 | 231.0| 230.2| 228.7| 212.4| 108.1| 89.5| 89.5|
BG=1 LS=30 cb_len=1980 | 231.1| 229.4| 227.1| 197.8| 111.2| 8.5| 8.5|
BG=1 LS=32 cb_len=768 | 259.3| 256.4| 255.4| 252.7| 119.3| 95.7| 95.7|
BG=1 LS=32 cb_len=2112 | 260.2| 259.3| 256.4| 253.6| 120.5| 98.8| 98.8|
BG=1 LS=36 cb_len=864 | 279.2| 277.3| 275.4| 270.7| 133.7| 8.8| 8.8|
BG=1 LS=36 cb_len=2376 | 280.2| 278.2| 276.4| 273.4| 134.6| 108.4| 108.4|
BG=1 LS=40 cb_len=960 | 321.7| 318.2| 315.9| 312.6| 140.3| 52.7| 52.7|
BG=1 LS=40 cb_len=2640 | 322.9| 321.6| 318.2| 312.6| 151.9| 124.5| 124.5|
BG=1 LS=44 cb_len=1056 | 347.5| 344.9| 341.4| 336.5| 166.5| 16.0| 16.0|
BG=1 LS=44 cb_len=2904 | 346.2| 342.5| 340.2| 335.5| 163.2| 128.1| 128.1|
BG=1 LS=48 cb_len=1152 | 375.0| 371.1| 369.7| 337.8| 174.2| 75.1| 75.1|
BG=1 LS=48 cb_len=3168 | 371.1| 368.5| 345.6| 153.4| 39.5| 19.1| 19.1|
BG=1 LS=52 cb_len=1248 | 397.7| 395.1| 393.8| 388.3| 183.5| 7.0| 7.0|
BG=1 LS=52 cb_len=3432 | 400.7| 396.3| 393.8| 368.3| 189.0| 23.9| 23.9|
BG=1 LS=56 cb_len=1344 | 434.5| 431.5| 429.8| 426.8| 208.4| 77.9| 77.9|
BG=1 LS=56 cb_len=3696 | 435.9| 433.0| 430.0| 408.4| 210.5| 106.0| 106.0|
BG=1 LS=60 cb_len=1440 | 455.9| 451.1| 448.2| 387.5| 208.4| 57.2| 57.2|
BG=1 LS=60 cb_len=3960 | 457.5| 452.8| 449.7| 385.2| 217.7| 90.3| 90.3|
BG=1 LS=64 cb_len=1536 | 501.9| 500.1| 498.2| 425.8| 228.8| 166.1| 166.1|
BG=1 LS=64 cb_len=4224 | 496.4| 459.2| 413.3| 144.8| 30.5| 4.0| 4.0|
BG=1 LS=72 cb_len=1728 | 545.0| 537.8| 532.2| 509.9| 230.5| 186.6| 186.6|
BG=1 LS=72 cb_len=4752 | 547.1| 543.2| 536.0| 525.1| 240.2| 82.3| 82.3|
BG=1 LS=80 cb_len=1920 | 616.4| 612.1| 605.8| 291.8| 237.0| 5.3| 5.3|
BG=1 LS=80 cb_len=5280 | 614.0| 605.8| 599.6| 241.3| 212.1| 5.3| 5.3|
BG=1 LS=88 cb_len=2112 | 685.0| 680.4| 675.7| 661.8| 309.2| 237.4| 237.4|
BG=1 LS=88 cb_len=5808 | 682.8| 675.7| 668.7| 655.1| 304.7| 93.0| 93.0|
BG=1 LS=96 cb_len=2304 | 772.2| 763.8| 758.3| 747.3| 346.1| 288.0| 288.0|
BG=1 LS=96 cb_len=6336 | 771.9| 761.0| 755.6| 742.0| 361.5| 135.7| 135.7|
BG=1 LS=104 cb_len=2496 | 784.6| 779.2| 774.0| 753.8| 338.8| 188.5| 188.5|
BG=1 LS=104 cb_len=6864 | 793.0| 784.9| 776.9| 763.9| 375.0| 302.0| 302.0|
BG=1 LS=112 cb_len=2688 | 865.7| 854.0| 848.1| 839.5| 411.2| 316.1| 316.1|
BG=1 LS=112 cb_len=7392 | 860.0| 850.8| 806.5| 94.7| 60.1| 44.5| 44.5|
BG=1 LS=120 cb_len=2880 | 905.6| 899.1| 893.0| 836.5| 416.9| 162.1| 162.1|
BG=1 LS=120 cb_len=7920 | 905.3| 899.1| 884.1| 841.8| 420.9| 62.6| 62.6|
BG=1 LS=128 cb_len=3072 | 1014.7| 1007.1| 996.8| 982.8| 472.4| 373.2| 373.2|
BG=1 LS=128 cb_len=8448 | 1014.7| 1007.5| 993.2| 904.0| 475.5| 395.3| 395.3|
BG=1 LS=144 cb_len=3456 | 1047.2| 1036.6| 1026.5| 1006.9| 492.5| 46.5| 46.5|
BG=1 LS=144 cb_len=9504 | 1050.7| 1043.4| 1033.6| 1013.4| 514.2| 433.7| 433.7|
BG=1 LS=160 cb_len=3840 | 1199.3| 1190.7| 1182.7| 1118.8| 590.5| 458.0| 458.0|
BG=1 LS=160 cb_len=10560| 1199.3| 1191.2| 1182.7| 1163.2| 593.4| 520.4| 520.4|
BG=1 LS=176 cb_len=4224 | 1234.6| 1222.9| 1215.3| 1192.8| 594.5| 213.7| 213.7|
BG=1 LS=176 cb_len=11616| 1238.6| 1230.7| 1222.9| 1178.3| 617.4| 417.3| 417.3|
BG=1 LS=192 cb_len=4608 | 1382.1| 1373.2| 1364.3| 1342.6| 668.2| 83.8| 83.8|
BG=1 LS=192 cb_len=12672| 1364.3| 1351.6| 1346.9| 1325.8| 611.0| 507.3| 507.3|
BG=1 LS=208 cb_len=4992 | 1367.6| 1355.0| 1343.1| 549.6| 528.0| 33.2| 33.2|
BG=1 LS=208 cb_len=13728| 1371.7| 1359.4| 1347.4| 1324.0| 702.7| 640.6| 640.6|
BG=1 LS=224 cb_len=5376 | 1546.7| 1532.3| 1522.8| 1495.1| 748.7| 332.5| 332.5|
BG=1 LS=224 cb_len=14784| 1556.5| 1546.7| 1532.3| 1504.2| 783.2| 684.1| 684.1|
BG=1 LS=240 cb_len=5760 | 1611.7| 1601.9| 1591.7| 1563.9| 810.8| 485.6| 485.6|
BG=1 LS=240 cb_len=15840| 1587.4| 1573.3| 1559.3| 1531.7| 764.8| 694.3| 694.3|
BG=1 LS=256 cb_len=6144 | 1762.2| 1745.8| 1719.1| 788.4| 537.9| 58.1| 58.1|
BG=1 LS=256 cb_len=16896| 1762.2| 1735.0| 1648.7| 587.4| 189.5| 28.3| 28.3|
BG=1 LS=288 cb_len=6912 | 1659.9| 1646.5| 1630.0| 1553.7| 825.6| 37.5| 37.5|
BG=1 LS=288 cb_len=19008| 1690.9| 1673.0| 1659.9| 1630.0| 868.7| 274.9| 274.9|
BG=1 LS=320 cb_len=7680 | 2007.4| 1990.9| 1979.1| 1854.0| 929.4| 647.6| 647.6|
BG=1 LS=320 cb_len=21120| 2018.9| 1996.5| 1979.7| 1930.8| 361.6| 117.3| 117.3|
BG=1 LS=352 cb_len=8448 | 1947.1| 1932.6| 1918.2| 1880.9| 1073.6| 737.5| 737.5|
BG=1 LS=352 cb_len=23232| 1937.4| 1918.2| 1899.4| 1849.5| 1015.7| 830.2| 830.2|
BG=1 LS=384 cb_len=9216 | 2230.7| 2207.4| 2184.6| 1970.1| 1139.6| 982.7| 982.7|
BG=1 LS=384 cb_len=25344| 2236.6| 2219.0| 2201.7| 2145.2| 1187.6| 1118.3| 1118.3|
BG=2 LS=2 cb_len=24 | 13.8| 13.7| 13.6| 13.5| 4.4| 3.2| 3.2|
BG=2 LS=2 cb_len=100 | 14.0| 13.9| 13.8| 13.6| 4.5| 1.3| 1.3|
BG=2 LS=3 cb_len=36 | 20.5| 20.3| 20.2| 19.9| 6.7| 5.7| 5.7|
BG=2 LS=3 cb_len=150 | 20.5| 20.3| 20.2| 20.0| 6.7| 4.6| 4.6|
BG=2 LS=4 cb_len=48 | 27.1| 26.9| 26.8| 26.6| 9.0| 6.2| 6.2|
BG=2 LS=4 cb_len=200 | 27.1| 27.1| 26.9| 26.7| 9.0| 7.5| 7.5|
BG=2 LS=5 cb_len=60 | 33.7| 33.4| 33.2| 3.6| 3.6| 0.8| 0.8|
BG=2 LS=5 cb_len=250 | 33.4| 33.2| 31.3| 27.8| 11.0| 7.1| 7.1|
BG=2 LS=6 cb_len=72 | 39.9| 39.4| 39.1| 38.8| 13.4| 5.1| 5.1|
BG=2 LS=6 cb_len=300 | 40.1| 39.9| 39.6| 37.1| 3.2| 3.2| 3.2|
BG=2 LS=7 cb_len=84 | 45.9| 45.6| 45.3| 45.3| 15.2| 11.6| 11.6|
BG=2 LS=7 cb_len=350 | 46.2| 46.2| 46.2| 45.9| 15.3| 10.6| 10.6|
BG=2 LS=8 cb_len=96 | 54.3| 53.9| 53.2| 52.8| 17.8| 14.6| 14.6|
BG=2 LS=8 cb_len=400 | 54.3| 53.9| 53.5| 53.2| 17.5| 14.0| 14.0|
BG=2 LS=9 cb_len=108 | 59.1| 59.0| 58.7| 57.9| 19.6| 6.1| 6.1|
BG=2 LS=9 cb_len=450 | 59.8| 59.4| 58.7| 23.4| 18.4| 0.5| 0.5|
BG=2 LS=10 cb_len=120 | 59.7| 59.3| 55.4| 6.4| 4.6| 2.0| 2.0|
BG=2 LS=10 cb_len=500 | 59.7| 59.4| 59.0| 55.7| 20.7| 6.3| 6.3|
BG=2 LS=11 cb_len=132 | 72.7| 71.7| 71.7| 71.2| 24.3| 2.7| 2.7|
BG=2 LS=11 cb_len=550 | 72.7| 72.2| 71.2| 66.5| 5.8| 5.8| 5.8|
BG=2 LS=12 cb_len=144 | 80.4| 80.3| 80.3| 79.8| 26.8| 25.1| 25.1|
BG=2 LS=12 cb_len=600 | 80.3| 79.8| 79.8| 78.7| 26.4| 10.0| 10.0|
BG=2 LS=13 cb_len=156 | 83.7| 69.0| 67.2| 33.1| 20.4| 2.8| 2.8|
BG=2 LS=13 cb_len=650 | 84.2| 83.7| 83.7| 83.1| 28.5| 23.5| 23.5|
BG=2 LS=14 cb_len=168 | 91.9| 91.3| 91.3| 90.7| 31.1| 28.5| 28.5|
BG=2 LS=14 cb_len=700 | 91.9| 91.3| 90.7| 70.5| 24.8| 16.7| 16.7|
BG=2 LS=15 cb_len=180 | 98.4| 97.8| 97.2| 79.6| 32.1| 23.2| 23.2|
BG=2 LS=15 cb_len=750 | 98.4| 97.8| 97.8| 96.5| 33.9| 29.8| 29.8|
BG=2 LS=16 cb_len=192 | 108.6| 107.9| 107.8| 106.4| 36.2| 28.0| 28.0|
BG=2 LS=16 cb_len=800 | 108.6| 108.6| 107.8| 107.1| 35.8| 32.7| 32.7|
BG=2 LS=18 cb_len=216 | 118.1| 117.4| 116.6| 95.0| 39.3| 16.1| 16.1|
BG=2 LS=18 cb_len=900 | 117.4| 116.6| 115.9| 91.6| 38.4| 27.3| 27.3|
BG=2 LS=20 cb_len=240 | 133.9| 133.1| 133.0| 131.3| 43.6| 32.0| 32.0|
BG=2 LS=20 cb_len=1000 | 133.9| 133.1| 133.0| 131.3| 44.8| 21.9| 21.9|
BG=2 LS=22 cb_len=264 | 143.5| 143.5| 142.5| 141.6| 48.2| 15.7| 15.7|
BG=2 LS=22 cb_len=1100 | 143.5| 142.5| 141.6| 140.7| 47.9| 10.2| 10.2|
BG=2 LS=24 cb_len=288 | 162.9| 161.8| 160.7| 158.6| 13.0| 7.6| 7.6|
BG=2 LS=24 cb_len=1200 | 161.8| 161.8| 160.7| 130.9| 53.9| 49.1| 49.1|
BG=2 LS=26 cb_len=312 | 169.6| 168.5| 167.4| 139.5| 50.0| 20.4| 20.4|
BG=2 LS=26 cb_len=1300 | 168.5| 167.4| 67.0| 66.5| 44.5| 0.7| 0.7|
BG=2 LS=28 cb_len=336 | 182.6| 181.4| 180.2| 178.1| 68.1| 62.2| 62.2|
BG=2 LS=28 cb_len=1400 | 181.4| 180.2| 180.2| 72.0| 48.4| 5.2| 5.2|
BG=2 LS=30 cb_len=360 | 196.9| 195.6| 194.4| 163.5| 63.4| 28.6| 28.6|
BG=2 LS=30 cb_len=1500 | 193.1| 190.7| 180.3| 21.0| 9.2| 5.0| 5.0|
BG=2 LS=32 cb_len=384 | 214.3| 214.3| 212.9| 211.5| 64.3| 46.6| 46.6|
BG=2 LS=32 cb_len=1600 | 217.2| 213.0| 212.9| 203.4| 70.3| 58.3| 58.3|
BG=2 LS=36 cb_len=432 | 234.8| 233.3| 225.9| 206.5| 73.9| 4.5| 4.5|
BG=2 LS=36 cb_len=1800 | 234.8| 233.3| 233.3| 228.8| 77.2| 50.5| 50.5|
BG=2 LS=40 cb_len=480 | 271.5| 269.7| 267.9| 262.6| 90.1| 19.2| 19.2|
BG=2 LS=40 cb_len=2000 | 275.2| 271.7| 269.7| 262.6| 88.5| 53.8| 53.8|
BG=2 LS=44 cb_len=528 | 287.0| 285.1| 283.3| 277.9| 90.1| 25.8| 25.8|
BG=2 LS=44 cb_len=2200 | 285.1| 283.3| 283.3| 277.9| 92.8| 54.8| 54.8|
BG=2 LS=48 cb_len=576 | 319.5| 317.2| 315.1| 309.0| 105.7| 84.7| 84.7|
BG=2 LS=48 cb_len=2400 | 319.3| 313.1| 297.5| 34.6| 33.8| 10.1| 10.1|
BG=2 LS=52 cb_len=624 | 334.8| 332.6| 314.5| 307.1| 86.5| 38.5| 38.5|
BG=2 LS=52 cb_len=2600 | 334.8| 332.6| 330.5| 322.3| 103.5| 36.0| 36.0|
BG=2 LS=56 cb_len=672 | 367.6| 365.2| 360.5| 356.0| 117.9| 13.0| 13.0|
BG=2 LS=56 cb_len=2800 | 370.1| 362.9| 360.5| 340.8| 30.0| 29.9| 29.9|
BG=2 LS=60 cb_len=720 | 374.2| 369.6| 365.1| 360.7| 128.7| 36.1| 36.1|
BG=2 LS=60 cb_len=3000 | 374.2| 369.6| 367.4| 358.6| 129.0| 105.4| 105.4|
BG=2 LS=64 cb_len=768 | 440.7| 437.7| 434.7| 428.9| 141.3| 10.0| 10.0|
BG=2 LS=64 cb_len=3200 | 440.7| 437.7| 434.4| 423.0| 145.1| 131.1| 131.1|
BG=2 LS=72 cb_len=864 | 449.1| 443.6| 440.9| 432.9| 156.5| 62.1| 62.1|
BG=2 LS=72 cb_len=3600 | 449.1| 443.6| 438.2| 394.7| 147.5| 118.9| 118.9|
BG=2 LS=80 cb_len=960 | 502.1| 499.0| 492.9| 486.9| 174.7| 160.9| 160.9|
BG=2 LS=80 cb_len=4000 | 502.1| 495.9| 492.9| 483.9| 175.8| 125.1| 125.1|
BG=2 LS=88 cb_len=1056 | 532.3| 528.8| 522.8| 513.7| 188.8| 66.4| 66.4|
BG=2 LS=88 cb_len=4400 | 535.6| 529.1| 526.0| 516.7| 187.6| 163.8| 163.8|
BG=2 LS=96 cb_len=1152 | 638.7| 634.5| 626.2| 614.2| 213.9| 169.2| 169.2|
BG=2 LS=96 cb_len=4800 | 630.3| 618.1| 587.8| 69.1| 67.2| 22.7| 22.7|
BG=2 LS=104 cb_len=1248 | 656.9| 652.8| 648.7| 640.7| 221.8| 117.3| 117.3|
BG=2 LS=104 cb_len=5200 | 656.9| 652.8| 648.7| 640.7| 228.1| 201.9| 201.9|
BG=2 LS=112 cb_len=1344 | 707.5| 698.6| 665.4| 650.0| 237.8| 165.1| 165.1|
BG=2 LS=112 cb_len=5600 | 712.0| 707.5| 698.6| 685.8| 245.1| 155.4| 155.4|
BG=2 LS=120 cb_len=1440 | 739.3| 730.3| 721.5| 713.0| 262.1| 128.2| 128.2|
BG=2 LS=120 cb_len=6000 | 739.3| 734.8| 725.9| 713.0| 57.8| 57.8| 57.8|
BG=2 LS=128 cb_len=1536 | 783.8| 774.3| 769.6| 760.5| 272.9| 239.7| 239.7|
BG=2 LS=128 cb_len=6400 | 779.0| 774.3| 769.2| 713.8| 272.3| 129.4| 129.4|
BG=2 LS=144 cb_len=1728 | 855.6| 850.5| 845.5| 826.1| 306.4| 252.1| 252.1|
BG=2 LS=144 cb_len=7200 | 860.2| 850.5| 845.5| 830.9| 303.8| 275.3| 275.3|
BG=2 LS=160 cb_len=1920 | 939.5| 933.4| 923.2| 902.4| 338.3| 283.6| 283.6|
BG=2 LS=160 cb_len=8000 | 934.0| 923.2| 917.9| 902.4| 360.5| 79.2| 79.2|
BG=2 LS=176 cb_len=2112 | 987.1| 976.1| 970.2| 954.4| 365.2| 353.4| 353.4|
BG=2 LS=176 cb_len=8800 | 987.1| 976.1| 970.7| 954.9| 365.2| 282.0| 282.0|
BG=2 LS=192 cb_len=2304 | 1140.8| 1127.4| 1120.8| 1095.2| 410.4| 381.0| 381.0|
BG=2 LS=192 cb_len=9600 | 1140.8| 1127.4| 1114.3| 1100.9| 408.5| 387.1| 387.1|
BG=2 LS=208 cb_len=2496 | 1134.7| 1122.5| 1110.5| 1086.7| 414.3| 347.1| 347.1|
BG=2 LS=208 cb_len=10400| 1140.9| 1128.5| 1121.8| 1098.2| 425.4| 333.7| 333.7|
BG=2 LS=224 cb_len=2688 | 1146.3| 1129.0| 1107.2| 897.7| 94.9| 33.0| 33.0|
BG=2 LS=224 cb_len=11200| 1129.0| 1101.2| 1064.6| 126.2| 121.3| 35.1| 35.1|
BG=2 LS=240 cb_len=2880 | 1254.5| 1240.9| 1228.2| 1203.6| 472.5| 296.8| 296.8|
BG=2 LS=240 cb_len=12000| 1260.5| 1247.4| 1234.5| 1203.6| 443.6| 56.1| 56.1|
BG=2 LS=256 cb_len=3072 | 1264.8| 1252.4| 1234.3| 1156.2| 504.0| 430.1| 430.1|
BG=2 LS=256 cb_len=12800| 1264.8| 1252.4| 1240.3| 1216.7| 506.0| 258.3| 258.3|
BG=2 LS=288 cb_len=3456 | 1429.9| 1415.9| 1402.1| 1368.8| 566.9| 492.2| 492.2|
BG=2 LS=288 cb_len=14400| 1437.1| 1422.9| 1409.0| 1381.9| 577.1| 547.5| 547.5|
BG=2 LS=320 cb_len=3840 | 1445.3| 1426.0| 1413.4| 1376.9| 579.7| 432.7| 432.7|
BG=2 LS=320 cb_len=16000| 1458.5| 1438.8| 1426.0| 1400.4| 598.1| 175.7| 175.7|
BG=2 LS=352 cb_len=4224 | 1541.1| 1521.1| 1507.4| 618.5| 521.3| 40.0| 40.0|
BG=2 LS=352 cb_len=17600| 1568.6| 1547.9| 1527.1| 607.8| 471.5| 35.4| 35.4|
BG=2 LS=384 cb_len=4608 | 1766.3| 1742.2| 1696.1| 197.3| 144.9| 57.9| 57.9|
BG=2 LS=384 cb_len=19200| 1774.4| 1750.2| 1733.6| 1681.2| 690.5| 553.0| 553.0|

Vanilla, without the changes

BG=1 LS=384 cb_len=25344| 6064.6| 5936.7| 5814.1| 5583.6| 1979.3| 1650.3| 1650.3|

=> 8448/6e9 ~= 1400 ns

With the changes

BG=1 LS=384 cb_len=25344| 2236.6| 2219.0| 2201.7| 2145.2| 1187.6| 1118.3| 1118.3|

=> 8448/2.2e9 ~= 3900 ns

My own benchmark using libbenchmark

Without changes

BM_LDPC_SRS/384/384 1712 ns 1711 ns 416877

With changes

BM_LDPC_SRS/384/384 4065 ns 4065 ns 174381

So, around two-three times slower. The result looks consistent, and since memory accesses are the most expensive operation, I think that it makes sense. Please, let me know if I am not measuring it correctly.

dvdgrgrtt Dec 3, 2025
Maintainer

Hi @mirazabal,
thanks for the report! I have to admit I didn't expect such a difference. I only have one suggestion - instead of std::vector<uint8_t> tmp(max_cb_length_bg*ls), I'd do std::vector<uint8_t> tmp(cb_length), so you can compare the bit-rate (or encoding time) for different codeblock lengths - right now, you're always writing the whole codeblock, that's why you get the same result for each two consecutive lines. Recall that, in NR, you'll need more or less redundancy bits depending on the redundancy version and the MCS (this was one of the reasons for separating the high-rate region from the rest), and, in my opinion, it's interesting to know at least the two extreme values. Of course, you can add more intermediate values, if you find it interesting.

Answer selected by mirazabal

mirazabal Dec 9, 2025
Author

Hi @dvdgrgrtt thank you very much for the quick answer. Shall I create a PR for the benchmark with your suggested changes?

Other quick question. According to my understanding, according to 3GPP TS 38.212 version 15.2.0 Release 15 Section 7.2.2
LDPC base graph selection, if A ≤ 292 , or if A ≤ 3824 and R ≤ 0.67 , or if R ≤ 0.25 , LDPC base graph 2 is used;

AFAIU, this means that if the info bits are less than or equal to 292, the graph (BG) will always be 2 i.e., BG2. Thus, a Zc min of 14 is needed, i.e., 14x22 = 308 while 13x22=286.

When the project measures BG1 with lower Zc (e.g., BG=1 LS=10 cb_len=660 | 78.1| 77.8| 77.5| 67.7| 34.8| 29.0| 29.0|), is it there for completeness, or does it exist a case in 5G where such encoding is needed/foreseen?

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Benchmark LDPC Encoder #1423

Uh oh!

{{title}}

Uh oh!

Replies: 1 comment 3 replies

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{title}}

Uh oh!

Select a reply

Uh oh!

Benchmark LDPC Encoder #1423

Uh oh!

mirazabal Nov 20, 2025

Replies: 1 comment · 3 replies

Uh oh!

dvdgrgrtt Dec 2, 2025 Maintainer

Uh oh!

mirazabal Dec 2, 2025 Author

Uh oh!

dvdgrgrtt Dec 3, 2025 Maintainer

Uh oh!

mirazabal Dec 9, 2025 Author

mirazabal
Nov 20, 2025

Replies: 1 comment 3 replies

dvdgrgrtt
Dec 2, 2025
Maintainer

mirazabal Dec 2, 2025
Author

dvdgrgrtt Dec 3, 2025
Maintainer

mirazabal Dec 9, 2025
Author