Parallelize row groups

[simonswine]

This retrieves rowGroups in parallel, I don't think this is the way to go.

We rather should look at switchting the querying order to align completely with the block order (seriesId, then timeNanos)

❯ benchstat before.txt after.txt
name                                                                                                             old time/op    new time/op    delta
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-block:contentions:count:contentions:count-12       284ms ± 6%     269ms ± 1%   -5.25%  (p=0.016 n=5+4)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-block:delay:nanoseconds:contentions:count-12       289ms ± 8%     283ms ± 7%     ~     (p=0.151 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-goroutine:goroutine:count:goroutine:count-12       145ms ±15%     129ms ± 2%  -10.77%  (p=0.016 n=5+4)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:alloc_objects:count:space:bytes-12          123ms ± 6%     107ms ± 1%  -13.13%  (p=0.016 n=5+4)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:alloc_space:bytes:space:bytes-12            116ms ± 0%     106ms ± 5%   -8.92%  (p=0.016 n=4+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:inuse_objects:count:space:bytes-12          106ms ± 4%      95ms ± 6%  -10.19%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:inuse_space:bytes:space:bytes-12            106ms ± 5%      99ms ± 7%     ~     (p=0.056 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-mutex:contentions:count:contentions:count-12       128ms ± 2%     121ms ± 3%   -5.52%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-mutex:delay:nanoseconds:contentions:count-12       836ms ± 4%     810ms ± 0%   -3.05%  (p=0.016 n=5+4)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-process_cpu:cpu:nanoseconds:cpu:nanoseconds-12     1.53s ± 1%     1.53s ± 1%     ~     (p=0.690 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-process_cpu:samples:count:cpu:nanoseconds-12       1.47s ± 1%     1.48s ± 3%     ~     (p=0.841 n=5+5)

name                                                                                                             old alloc/op   new alloc/op   delta
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-block:contentions:count:contentions:count-12       492MB ± 0%     522MB ± 1%   +5.98%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-block:delay:nanoseconds:contentions:count-12       466MB ± 1%     495MB ± 1%   +6.14%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-goroutine:goroutine:count:goroutine:count-12       157MB ± 0%     186MB ± 1%  +18.44%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:alloc_objects:count:space:bytes-12          113MB ± 2%     142MB ± 0%  +25.31%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:alloc_space:bytes:space:bytes-12            122MB ± 1%     148MB ± 5%  +21.11%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:inuse_objects:count:space:bytes-12          101MB ± 2%     129MB ± 2%  +27.60%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:inuse_space:bytes:space:bytes-12            108MB ± 1%     138MB ± 3%  +26.92%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-mutex:contentions:count:contentions:count-12       158MB ± 1%     189MB ± 0%  +19.35%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-mutex:delay:nanoseconds:contentions:count-12       785MB ± 0%     813MB ± 1%   +3.56%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-process_cpu:cpu:nanoseconds:cpu:nanoseconds-12    1.56GB ± 0%    1.59GB ± 0%   +1.87%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-process_cpu:samples:count:cpu:nanoseconds-12      1.58GB ± 0%    1.61GB ± 0%   +1.65%  (p=0.008 n=5+5)

name                                                                                                             old allocs/op  new allocs/op  delta
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-block:contentions:count:contentions:count-12       66.6k ± 0%     67.3k ± 0%   +1.07%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-block:delay:nanoseconds:contentions:count-12       80.7k ± 0%     81.3k ± 0%   +0.80%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-goroutine:goroutine:count:goroutine:count-12       90.4k ± 0%     91.2k ± 0%   +0.86%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:alloc_objects:count:space:bytes-12           124k ± 0%      125k ± 0%   +0.56%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:alloc_space:bytes:space:bytes-12             113k ± 0%      114k ± 0%   +0.66%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:inuse_objects:count:space:bytes-12           111k ± 0%      112k ± 0%   +0.70%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-memory:inuse_space:bytes:space:bytes-12             108k ± 0%      109k ± 0%   +0.81%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-mutex:contentions:count:contentions:count-12       69.5k ± 0%     70.4k ± 0%   +1.33%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-mutex:delay:nanoseconds:contentions:count-12       1.30M ± 0%     1.30M ± 0%   +0.06%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-process_cpu:cpu:nanoseconds:cpu:nanoseconds-12     3.12M ± 0%     3.12M ± 0%   +0.03%  (p=0.008 n=5+5)
SelectMatchingProfilesRealBlock/block-01H406NQE5JEQPV6QBCC39BCHK-process_cpu:samples:count:cpu:nanoseconds-12       3.09M ± 0%     3.09M ± 0%   +0.03%  (p=0.008 n=5+5)