[Profiler] Generate reference chain by chrisnas · Pull Request #8225 · DataDog/dd-trace-dotnet

chrisnas · 2026-02-20T10:55:54Z

Summary of changes

Generate reference chain at type level

Reason for change

Last step to help pointing out memory leaks root cause (i.e. which root is responsible for keeping instances alive)

Implementation details

Listen to GC_BULK_ROOT_STATIC_VAR and GC_BULK_ROOT_EDGE to get the different kinds of root. Next, traverse the reference fields down to a leak (i.e. non reference object). The reference chain is kept at the type level to avoid consumming to much memory and serialized in .json format to be sent with profile data.

Test coverage

Unit tests and integration tests have been added.

Other details

dd-trace-dotnet-ci-bot · 2026-02-20T12:08:12Z

Execution-Time Benchmarks Report ⏱️

Execution-time results for samples comparing This PR (8225) and master.

⚠️ Potential regressions detected

HttpMessageHandler

Metric	Master (Mean ± 95% CI)	Current (Mean ± 95% CI)	Change	Status
.NET Framework 4.8 - Baseline
duration	189.70 ± (189.65 - 190.27) ms	206.90 ± (206.77 - 207.72) ms	+9.1%	❌⬆️
.NET Framework 4.8 - Bailout
duration	193.34 ± (193.23 - 193.63) ms	210.82 ± (210.58 - 211.34) ms	+9.0%	❌⬆️
.NET Framework 4.8 - CallTarget+Inlining+NGEN
duration	1139.41 ± (1139.56 - 1146.95) ms	1208.59 ± (1207.31 - 1213.22) ms	+6.1%	❌⬆️

Full Metrics Comparison

FakeDbCommand

Metric	Master (Mean ± 95% CI)	Current (Mean ± 95% CI)	Change	Status
.NET Framework 4.8 - Baseline
duration	71.47 ± (71.49 - 71.85) ms	72.07 ± (72.17 - 72.54) ms	+0.8%	✅⬆️
.NET Framework 4.8 - Bailout
duration	75.52 ± (75.52 - 75.83) ms	75.60 ± (75.56 - 75.88) ms	+0.1%	✅⬆️
.NET Framework 4.8 - CallTarget+Inlining+NGEN
duration	1059.28 ± (1061.24 - 1066.75) ms	1061.18 ± (1062.33 - 1067.86) ms	+0.2%	✅⬆️
.NET Core 3.1 - Baseline
process.internal_duration_ms	22.47 ± (22.43 - 22.50) ms	22.31 ± (22.28 - 22.34) ms	-0.7%	✅
process.time_to_main_ms	83.44 ± (83.23 - 83.65) ms	83.35 ± (83.16 - 83.54) ms	-0.1%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.90 ± (10.90 - 10.91) MB	10.90 ± (10.90 - 10.91) MB	+0.0%	✅⬆️
runtime.dotnet.threads.count	12 ± (12 - 12)	12 ± (12 - 12)	+0.0%	✅
.NET Core 3.1 - Bailout
process.internal_duration_ms	22.45 ± (22.41 - 22.49) ms	22.34 ± (22.30 - 22.37) ms	-0.5%	✅
process.time_to_main_ms	85.06 ± (84.84 - 85.27) ms	85.38 ± (85.17 - 85.60) ms	+0.4%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.87 ± (10.87 - 10.88) MB	10.94 ± (10.93 - 10.94) MB	+0.6%	✅⬆️
runtime.dotnet.threads.count	13 ± (13 - 13)	13 ± (13 - 13)	+0.0%	✅
.NET Core 3.1 - CallTarget+Inlining+NGEN
process.internal_duration_ms	224.72 ± (223.60 - 225.85) ms	224.90 ± (223.80 - 226.00) ms	+0.1%	✅⬆️
process.time_to_main_ms	518.20 ± (517.14 - 519.25) ms	515.42 ± (514.32 - 516.52) ms	-0.5%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	47.77 ± (47.74 - 47.80) MB	47.77 ± (47.73 - 47.81) MB	-0.0%	✅
runtime.dotnet.threads.count	28 ± (28 - 28)	28 ± (28 - 28)	+0.3%	✅⬆️
.NET 6 - Baseline
process.internal_duration_ms	21.08 ± (21.05 - 21.12) ms	21.08 ± (21.05 - 21.11) ms	-0.0%	✅
process.time_to_main_ms	72.62 ± (72.46 - 72.78) ms	72.78 ± (72.61 - 72.96) ms	+0.2%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.60 ± (10.60 - 10.61) MB	10.62 ± (10.62 - 10.62) MB	+0.2%	✅⬆️
runtime.dotnet.threads.count	10 ± (10 - 10)	10 ± (10 - 10)	+0.0%	✅
.NET 6 - Bailout
process.internal_duration_ms	20.90 ± (20.86 - 20.93) ms	20.87 ± (20.83 - 20.91) ms	-0.1%	✅
process.time_to_main_ms	73.09 ± (72.92 - 73.25) ms	73.17 ± (72.99 - 73.34) ms	+0.1%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.72 ± (10.71 - 10.72) MB	10.73 ± (10.73 - 10.73) MB	+0.1%	✅⬆️
runtime.dotnet.threads.count	11 ± (11 - 11)	11 ± (11 - 11)	+0.0%	✅
.NET 6 - CallTarget+Inlining+NGEN
process.internal_duration_ms	388.37 ± (386.55 - 390.19) ms	385.19 ± (383.20 - 387.18) ms	-0.8%	✅
process.time_to_main_ms	516.60 ± (515.62 - 517.58) ms	517.29 ± (516.41 - 518.18) ms	+0.1%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	49.89 ± (49.87 - 49.92) MB	49.99 ± (49.96 - 50.01) MB	+0.2%	✅⬆️
runtime.dotnet.threads.count	28 ± (28 - 28)	28 ± (28 - 28)	-0.1%	✅
.NET 8 - Baseline
process.internal_duration_ms	19.16 ± (19.12 - 19.19) ms	19.22 ± (19.18 - 19.25) ms	+0.3%	✅⬆️
process.time_to_main_ms	71.47 ± (71.30 - 71.64) ms	71.39 ± (71.23 - 71.56) ms	-0.1%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	7.67 ± (7.66 - 7.67) MB	7.67 ± (7.66 - 7.68) MB	+0.1%	✅⬆️
runtime.dotnet.threads.count	10 ± (10 - 10)	10 ± (10 - 10)	+0.0%	✅
.NET 8 - Bailout
process.internal_duration_ms	19.18 ± (19.15 - 19.22) ms	19.22 ± (19.18 - 19.26) ms	+0.2%	✅⬆️
process.time_to_main_ms	72.54 ± (72.37 - 72.71) ms	72.11 ± (72.00 - 72.21) ms	-0.6%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	7.72 ± (7.71 - 7.72) MB	7.72 ± (7.71 - 7.72) MB	+0.0%	✅⬆️
runtime.dotnet.threads.count	11 ± (11 - 11)	11 ± (11 - 11)	+0.0%	✅
.NET 8 - CallTarget+Inlining+NGEN
process.internal_duration_ms	306.20 ± (304.03 - 308.38) ms	302.91 ± (300.74 - 305.08) ms	-1.1%	✅
process.time_to_main_ms	478.08 ± (477.34 - 478.82) ms	479.87 ± (479.20 - 480.53) ms	+0.4%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	36.98 ± (36.96 - 37.00) MB	36.90 ± (36.87 - 36.93) MB	-0.2%	✅
runtime.dotnet.threads.count	27 ± (27 - 27)	27 ± (27 - 27)	+0.1%	✅⬆️

HttpMessageHandler

Metric	Master (Mean ± 95% CI)	Current (Mean ± 95% CI)	Change	Status
.NET Framework 4.8 - Baseline
duration	189.70 ± (189.65 - 190.27) ms	206.90 ± (206.77 - 207.72) ms	+9.1%	❌⬆️
.NET Framework 4.8 - Bailout
duration	193.34 ± (193.23 - 193.63) ms	210.82 ± (210.58 - 211.34) ms	+9.0%	❌⬆️
.NET Framework 4.8 - CallTarget+Inlining+NGEN
duration	1139.41 ± (1139.56 - 1146.95) ms	1208.59 ± (1207.31 - 1213.22) ms	+6.1%	❌⬆️
.NET Core 3.1 - Baseline
process.internal_duration_ms	185.24 ± (185.01 - 185.47) ms	204.73 ± (204.26 - 205.20) ms	+10.5%	✅⬆️
process.time_to_main_ms	79.23 ± (79.06 - 79.40) ms	88.64 ± (88.39 - 88.89) ms	+11.9%	✅⬆️
runtime.dotnet.exceptions.count	3 ± (3 - 3)	3 ± (3 - 3)	+0.0%	✅
runtime.dotnet.mem.committed	16.13 ± (16.10 - 16.15) MB	15.96 ± (15.95 - 15.98) MB	-1.0%	✅
runtime.dotnet.threads.count	20 ± (19 - 20)	20 ± (20 - 20)	+1.1%	✅⬆️
.NET Core 3.1 - Bailout
process.internal_duration_ms	184.33 ± (184.18 - 184.47) ms	203.28 ± (202.79 - 203.77) ms	+10.3%	✅⬆️
process.time_to_main_ms	80.45 ± (80.35 - 80.54) ms	89.13 ± (88.88 - 89.38) ms	+10.8%	✅⬆️
runtime.dotnet.exceptions.count	3 ± (3 - 3)	3 ± (3 - 3)	+0.0%	✅
runtime.dotnet.mem.committed	15.80 ± (15.66 - 15.93) MB	16.00 ± (15.98 - 16.02) MB	+1.3%	✅⬆️
runtime.dotnet.threads.count	20 ± (20 - 20)	21 ± (21 - 21)	+5.0%	✅⬆️
.NET Core 3.1 - CallTarget+Inlining+NGEN
process.internal_duration_ms	388.94 ± (387.40 - 390.49) ms	414.73 ± (413.47 - 415.99) ms	+6.6%	✅⬆️
process.time_to_main_ms	499.49 ± (498.34 - 500.64) ms	544.46 ± (543.23 - 545.68) ms	+9.0%	✅⬆️
runtime.dotnet.exceptions.count	3 ± (3 - 3)	3 ± (3 - 3)	+0.0%	✅
runtime.dotnet.mem.committed	57.45 ± (57.24 - 57.67) MB	58.70 ± (58.66 - 58.75) MB	+2.2%	✅⬆️
runtime.dotnet.threads.count	30 ± (29 - 30)	30 ± (30 - 30)	+1.7%	✅⬆️
.NET 6 - Baseline
process.internal_duration_ms	189.37 ± (189.12 - 189.62) ms	208.01 ± (207.59 - 208.43) ms	+9.8%	✅⬆️
process.time_to_main_ms	69.01 ± (68.89 - 69.14) ms	76.35 ± (76.09 - 76.61) ms	+10.6%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	16.18 ± (16.02 - 16.33) MB	16.26 ± (16.23 - 16.29) MB	+0.5%	✅⬆️
runtime.dotnet.threads.count	18 ± (18 - 18)	20 ± (19 - 20)	+8.1%	✅⬆️
.NET 6 - Bailout
process.internal_duration_ms	188.39 ± (188.24 - 188.55) ms	207.26 ± (206.76 - 207.77) ms	+10.0%	✅⬆️
process.time_to_main_ms	69.80 ± (69.76 - 69.85) ms	77.73 ± (77.49 - 77.98) ms	+11.4%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	15.79 ± (15.62 - 15.96) MB	16.26 ± (16.24 - 16.29) MB	+3.0%	✅⬆️
runtime.dotnet.threads.count	19 ± (18 - 19)	21 ± (20 - 21)	+10.8%	✅⬆️
.NET 6 - CallTarget+Inlining+NGEN
process.internal_duration_ms	598.97 ± (596.47 - 601.48) ms	597.57 ± (594.70 - 600.45) ms	-0.2%	✅
process.time_to_main_ms	503.12 ± (502.25 - 503.98) ms	543.60 ± (542.04 - 545.16) ms	+8.0%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	61.56 ± (61.46 - 61.66) MB	61.60 ± (61.48 - 61.72) MB	+0.1%	✅⬆️
runtime.dotnet.threads.count	30 ± (30 - 30)	31 ± (31 - 31)	+1.2%	✅⬆️
.NET 8 - Baseline
process.internal_duration_ms	187.70 ± (187.47 - 187.93) ms	205.21 ± (204.81 - 205.61) ms	+9.3%	✅⬆️
process.time_to_main_ms	68.47 ± (68.33 - 68.61) ms	75.87 ± (75.59 - 76.15) ms	+10.8%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	11.58 ± (11.47 - 11.69) MB	11.65 ± (11.63 - 11.67) MB	+0.6%	✅⬆️
runtime.dotnet.threads.count	17 ± (17 - 18)	19 ± (19 - 19)	+8.6%	✅⬆️
.NET 8 - Bailout
process.internal_duration_ms	186.78 ± (186.58 - 186.97) ms	204.97 ± (204.51 - 205.43) ms	+9.7%	✅⬆️
process.time_to_main_ms	69.38 ± (69.33 - 69.44) ms	77.16 ± (76.95 - 77.37) ms	+11.2%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	11.76 ± (11.69 - 11.84) MB	11.68 ± (11.66 - 11.69) MB	-0.7%	✅
runtime.dotnet.threads.count	19 ± (18 - 19)	20 ± (20 - 20)	+7.2%	✅⬆️
.NET 8 - CallTarget+Inlining+NGEN
process.internal_duration_ms	519.29 ± (516.15 - 522.43) ms	524.81 ± (520.00 - 529.63) ms	+1.1%	✅⬆️
process.time_to_main_ms	462.40 ± (461.78 - 463.01) ms	503.12 ± (502.10 - 504.14) ms	+8.8%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	50.71 ± (50.68 - 50.74) MB	50.69 ± (50.63 - 50.76) MB	-0.0%	✅
runtime.dotnet.threads.count	30 ± (30 - 30)	30 ± (30 - 30)	+0.9%	✅⬆️

Comparison explanation

Execution-time benchmarks measure the whole time it takes to execute a program, and are intended to measure the one-off costs. Cases where the execution time results for the PR are worse than latest master results are highlighted in **red**. The following thresholds were used for comparing the execution times:

Welch test with statistical test for significance of 5%
Only results indicating a difference greater than 5% and 5 ms are considered.

Note that these results are based on a single point-in-time result for each branch. For full results, see the dashboard.

Graphs show the p99 interval based on the mean and StdDev of the test run, as well as the mean value of the run (shown as a diamond below the graph).

Duration charts

FakeDbCommand (.NET Framework 4.8)

gantt
    title Execution time (ms) FakeDbCommand (.NET Framework 4.8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8225) - mean (72ms)  : 70, 75
    master - mean (72ms)  : 69, 74

    section Bailout
    This PR (8225) - mean (76ms)  : 74, 77
    master - mean (76ms)  : 74, 77

    section CallTarget+Inlining+NGEN
    This PR (8225) - mean (1,065ms)  : 1025, 1105
    master - mean (1,064ms)  : 1025, 1103

FakeDbCommand (.NET Core 3.1)

gantt
    title Execution time (ms) FakeDbCommand (.NET Core 3.1)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8225) - mean (113ms)  : 108, 117
    master - mean (113ms)  : 109, 116

    section Bailout
    This PR (8225) - mean (114ms)  : 111, 117
    master - mean (114ms)  : 111, 117

    section CallTarget+Inlining+NGEN
    This PR (8225) - mean (777ms)  : 758, 796
    master - mean (779ms)  : 756, 801

FakeDbCommand (.NET 6)

gantt
    title Execution time (ms) FakeDbCommand (.NET 6)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8225) - mean (100ms)  : 97, 103
    master - mean (100ms)  : 97, 103

    section Bailout
    This PR (8225) - mean (100ms)  : 98, 103
    master - mean (100ms)  : 97, 103

    section CallTarget+Inlining+NGEN
    This PR (8225) - mean (930ms)  : 897, 964
    master - mean (933ms)  : 896, 971

FakeDbCommand (.NET 8)

gantt
    title Execution time (ms) FakeDbCommand (.NET 8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8225) - mean (98ms)  : 95, 101
    master - mean (98ms)  : 95, 101

    section Bailout
    This PR (8225) - mean (99ms)  : 97, 100
    master - mean (99ms)  : 97, 102

    section CallTarget+Inlining+NGEN
    This PR (8225) - mean (812ms)  : 780, 844
    master - mean (815ms)  : 777, 852

HttpMessageHandler (.NET Framework 4.8)

gantt
    title Execution time (ms) HttpMessageHandler (.NET Framework 4.8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8225) - mean (207ms)  : 202, 213
    master - mean (190ms)  : 187, 193

    section Bailout
    This PR (8225) - mean (211ms)  : crit, 207, 215
    master - mean (193ms)  : 192, 195

    section CallTarget+Inlining+NGEN
    This PR (8225) - mean (1,210ms)  : crit, 1167, 1254
    master - mean (1,143ms)  : 1090, 1197

HttpMessageHandler (.NET Core 3.1)

gantt
    title Execution time (ms) HttpMessageHandler (.NET Core 3.1)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8225) - mean (303ms)  : 295, 310
    master - mean (272ms)  : 268, 276

    section Bailout
    This PR (8225) - mean (301ms)  : crit, 295, 308
    master - mean (273ms)  : 270, 275

    section CallTarget+Inlining+NGEN
    This PR (8225) - mean (997ms)  : crit, 970, 1024
    master - mean (919ms)  : 899, 939

HttpMessageHandler (.NET 6)

gantt
    title Execution time (ms) HttpMessageHandler (.NET 6)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8225) - mean (293ms)  : 287, 300
    master - mean (266ms)  : 263, 270

    section Bailout
    This PR (8225) - mean (294ms)  : crit, 287, 301
    master - mean (266ms)  : 264, 268

    section CallTarget+Inlining+NGEN
    This PR (8225) - mean (1,173ms)  : 1139, 1206
    master - mean (1,134ms)  : 1097, 1170

HttpMessageHandler (.NET 8)

gantt
    title Execution time (ms) HttpMessageHandler (.NET 8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8225) - mean (292ms)  : 285, 299
    master - mean (266ms)  : 262, 269

    section Bailout
    This PR (8225) - mean (293ms)  : crit, 285, 300
    master - mean (265ms)  : 263, 267

    section CallTarget+Inlining+NGEN
    This PR (8225) - mean (1,062ms)  : 989, 1136
    master - mean (1,009ms)  : 944, 1074

pr-commenter · 2026-02-20T12:09:29Z

Benchmarks

Benchmark execution time: 2026-04-03 13:47:26

Comparing candidate commit 0230f16 in PR branch chrisnas/reference_chain with baseline commit 0932573 in branch master.

Found 7 performance improvements and 10 performance regressions! Performance is the same for 262 metrics, 9 unstable metrics.

Explanation

This is an A/B test comparing a candidate commit's performance against that of a baseline commit. Performance changes are noted in the tables below as:

🟩 = significantly better candidate vs. baseline
🟥 = significantly worse candidate vs. baseline

We compute a confidence interval (CI) over the relative difference of means between metrics from the candidate and baseline commits, considering the baseline as the reference.

If the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD), the change is considered significant.

Feel free to reach out to #apm-benchmarking-platform on Slack if you have any questions.

More details about the CI and significant changes

You can imagine this CI as a range of values that is likely to contain the true difference of means between the candidate and baseline commits.

CIs of the difference of means are often centered around 0%, because often changes are not that big:

---------------------------------(------|---^--------)-------------------------------->
                              -0.6%    0%  0.3%     +1.2%
                                 |          |        |
         lower bound of the CI --'          |        |
sample mean (center of the CI) -------------'        |
         upper bound of the CI ----------------------'

As described above, a change is considered significant if the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD).

For instance, for an execution time metric, this confidence interval indicates a significantly worse performance:

----------------------------------------|---------|---(---------^---------)---------->
                                       0%        1%  1.3%      2.2%      3.1%
                                                  |   |         |         |
       significant impact threshold --------------'   |         |         |
                      lower bound of CI --------------'         |         |
       sample mean (center of the CI) --------------------------'         |
                      upper bound of CI ----------------------------------'

scenario:Benchmarks.Trace.Asm.AppSecEncoderBenchmark.EncodeLegacyArgs netcoreapp3.1

🟩 execution_time [-23.897ms; -23.315ms] or [-11.744%; -11.458%]

scenario:Benchmarks.Trace.CIVisibilityProtocolWriterBenchmark.WriteAndFlushEnrichedTraces netcoreapp3.1

🟩 execution_time [-52.599ms; -48.038ms] or [-25.764%; -23.530%]

scenario:Benchmarks.Trace.CharSliceBenchmark.OptimizedCharSlice net472

🟥 execution_time [+106.958µs; +112.215µs] or [+5.636%; +5.913%]
🟥 throughput [-29.455op/s; -28.079op/s] or [-5.590%; -5.329%]

scenario:Benchmarks.Trace.CharSliceBenchmark.OptimizedCharSlice net6.0

🟩 execution_time [-181.044µs; -178.142µs] or [-11.707%; -11.519%]
🟩 throughput [+84.257op/s; +85.652op/s] or [+13.031%; +13.246%]

scenario:Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatAspectBenchmark net6.0

🟥 throughput [-322.448op/s; -124.152op/s] or [-14.898%; -5.736%]

scenario:Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatAspectBenchmark netcoreapp3.1

🟩 throughput [+188.505op/s; +364.466op/s] or [+10.582%; +20.460%]

scenario:Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatBenchmark net6.0

🟥 throughput [-3626.328op/s; -1367.628op/s] or [-15.223%; -5.741%]

scenario:Benchmarks.Trace.Log4netBenchmark.EnrichedLog netcoreapp3.1

🟥 execution_time [+21.948ms; +25.535ms] or [+12.336%; +14.353%]

scenario:Benchmarks.Trace.RedisBenchmark.SendReceive netcoreapp3.1

🟥 execution_time [+15.233ms; +20.552ms] or [+7.983%; +10.771%]

scenario:Benchmarks.Trace.SingleSpanAspNetCoreBenchmark.SingleSpanAspNetCore net6.0

🟥 execution_time [+105.535ms; +107.610ms] or [+114.869%; +117.127%]

scenario:Benchmarks.Trace.SingleSpanAspNetCoreBenchmark.SingleSpanAspNetCore netcoreapp3.1

🟩 throughput [+14717663.103op/s; +15923767.442op/s] or [+6.529%; +7.064%]

scenario:Benchmarks.Trace.SpanBenchmark.StartFinishScope net6.0

🟥 execution_time [+13.834ms; +17.628ms] or [+6.932%; +8.834%]

scenario:Benchmarks.Trace.SpanBenchmark.StartFinishSpan net6.0

🟥 execution_time [+16.338ms; +20.205ms] or [+8.164%; +10.097%]

scenario:Benchmarks.Trace.SpanBenchmark.StartFinishSpan netcoreapp3.1

🟩 execution_time [-15.270ms; -13.738ms] or [-7.118%; -6.404%]

scenario:Benchmarks.Trace.SpanBenchmark.StartFinishTwoScopes netcoreapp3.1

🟥 execution_time [+16.051ms; +20.132ms] or [+8.213%; +10.302%]

Fixing tests and tooling

First try

e9b0e05

chrisnas requested a review from a team as a code owner February 20, 2026 10:55

chrisnas added 2 commits February 20, 2026 12:23

Cleanup code

d1ef6e7

Merge remote-tracking branch 'origin' into chrisnas/reference_chain

1b8f20c

github-actions bot added the area:profiler Issues related to the continous-profiler label Feb 20, 2026

chrisnas added 2 commits March 3, 2026 12:39

Add reference chain explorer tool for easier visualization

7621e31

Merge remote-tracking branch 'origin' into chrisnas/reference_chain

abeb7e0

chrisnas requested a review from a team as a code owner March 3, 2026 11:41

chrisnas added 14 commits March 4, 2026 17:30

First implementation with tooling

ed825a8

Merge remote-tracking branch 'origin' into chrisnas/reference_chain

0ac65a9

Merge remote-tracking branch 'origin' into chrisnas/reference_chain

4e5998f

Fixing tests and tooling

Add filter in reference tree

f7ddff0

Remove debug logging

ad1faa5

Merge remote-tracking branch 'origin' into chrisnas/reference_chain

2ce39ea

Add plan to review optimizations

958e9a0

Optimize references processing and json serialization

4c467d7

Merge remote-tracking branch 'origin' into chrisnas/reference_chain

4e336b1

Measure memory consumption and avoid memory cleanup

764901c

Optimize processing

67ac685

Merge remote-tracking branch 'origin' into chrisnas/reference_chain

671770e

Optimize implementation and support structs

81f7f56

Merge remote-tracking branch 'origin' into chrisnas/reference_chain

0230f16

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

[Profiler] Generate reference chain#8225

[Profiler] Generate reference chain#8225
chrisnas wants to merge 19 commits intomasterfrom
chrisnas/reference_chain

chrisnas commented Feb 20, 2026

Uh oh!

dd-trace-dotnet-ci-bot bot commented Feb 20, 2026 •

edited

Loading

FakeDbCommand

HttpMessageHandler

Uh oh!

pr-commenter bot commented Feb 20, 2026 •

edited

Loading

Explanation

More details about the CI and significant changes

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

1 participant

Conversation

chrisnas commented Feb 20, 2026

Summary of changes

Reason for change

Implementation details

Test coverage

Other details

Uh oh!

dd-trace-dotnet-ci-bot bot commented Feb 20, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Execution-Time Benchmarks Report ⏱️

⚠️ Potential regressions detected

HttpMessageHandler

FakeDbCommand

HttpMessageHandler

Uh oh!

pr-commenter bot commented Feb 20, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Benchmarks

Explanation

More details about the CI and significant changes

scenario:Benchmarks.Trace.Asm.AppSecEncoderBenchmark.EncodeLegacyArgs netcoreapp3.1

scenario:Benchmarks.Trace.CIVisibilityProtocolWriterBenchmark.WriteAndFlushEnrichedTraces netcoreapp3.1

scenario:Benchmarks.Trace.CharSliceBenchmark.OptimizedCharSlice net472

scenario:Benchmarks.Trace.CharSliceBenchmark.OptimizedCharSlice net6.0

scenario:Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatAspectBenchmark net6.0

scenario:Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatAspectBenchmark netcoreapp3.1

scenario:Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatBenchmark net6.0

scenario:Benchmarks.Trace.Log4netBenchmark.EnrichedLog netcoreapp3.1

scenario:Benchmarks.Trace.RedisBenchmark.SendReceive netcoreapp3.1

scenario:Benchmarks.Trace.SingleSpanAspNetCoreBenchmark.SingleSpanAspNetCore net6.0

scenario:Benchmarks.Trace.SingleSpanAspNetCoreBenchmark.SingleSpanAspNetCore netcoreapp3.1

scenario:Benchmarks.Trace.SpanBenchmark.StartFinishScope net6.0

scenario:Benchmarks.Trace.SpanBenchmark.StartFinishSpan net6.0

scenario:Benchmarks.Trace.SpanBenchmark.StartFinishSpan netcoreapp3.1

scenario:Benchmarks.Trace.SpanBenchmark.StartFinishTwoScopes netcoreapp3.1

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

1 participant

dd-trace-dotnet-ci-bot bot commented Feb 20, 2026 •

edited

Loading

pr-commenter bot commented Feb 20, 2026 •

edited

Loading