Use multiprocessor compilation by NachoEchevarria · Pull Request #8925 · DataDog/dd-trace-dotnet

NachoEchevarria · 2026-07-22T10:06:06Z

Summary of changes

Reason for change

Implementation details

Test coverage

Other details

dd-trace-dotnet-ci-bot · 2026-07-22T10:56:03Z

Execution-Time Benchmarks Report ⏱️

Execution-time results for samples comparing This PR (8925) and master.

✅ No regressions detected - check the details below

Full Metrics Comparison

FakeDbCommand

Metric	Master (Mean ± 95% CI)	Current (Mean ± 95% CI)	Change	Status
.NET Framework 4.8 - Baseline
duration	71.24 ± (71.27 - 71.63) ms	75.09 ± (74.71 - 75.30) ms	+5.4%	✅⬆️
.NET Framework 4.8 - Bailout
duration	75.39 ± (75.08 - 75.45) ms	78.52 ± (78.56 - 79.13) ms	+4.2%	✅⬆️
.NET Framework 4.8 - CallTarget+Inlining+NGEN
duration	1095.75 ± (1094.49 - 1101.76) ms	1090.27 ± (1088.98 - 1096.35) ms	-0.5%	✅
.NET Core 3.1 - Baseline
process.internal_duration_ms	22.08 ± (22.05 - 22.12) ms	22.49 ± (22.43 - 22.54) ms	+1.8%	✅⬆️
process.time_to_main_ms	81.85 ± (81.69 - 82.02) ms	86.22 ± (85.93 - 86.50) ms	+5.3%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	11.02 ± (11.01 - 11.02) MB	11.02 ± (11.02 - 11.02) MB	+0.0%	✅⬆️
runtime.dotnet.threads.count	12 ± (12 - 12)	12 ± (12 - 12)	+0.0%	✅
.NET Core 3.1 - Bailout
process.internal_duration_ms	22.06 ± (22.03 - 22.09) ms	21.96 ± (21.93 - 21.99) ms	-0.5%	✅
process.time_to_main_ms	82.72 ± (82.58 - 82.85) ms	83.41 ± (83.21 - 83.60) ms	+0.8%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	11.03 ± (11.03 - 11.04) MB	11.05 ± (11.05 - 11.06) MB	+0.1%	✅⬆️
runtime.dotnet.threads.count	13 ± (13 - 13)	13 ± (13 - 13)	+0.0%	✅
.NET Core 3.1 - CallTarget+Inlining+NGEN
process.internal_duration_ms	210.60 ± (209.62 - 211.59) ms	211.17 ± (210.36 - 211.98) ms	+0.3%	✅⬆️
process.time_to_main_ms	539.44 ± (538.27 - 540.61) ms	540.36 ± (538.84 - 541.88) ms	+0.2%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	49.49 ± (49.46 - 49.51) MB	49.47 ± (49.44 - 49.50) MB	-0.0%	✅
runtime.dotnet.threads.count	28 ± (28 - 28)	28 ± (28 - 28)	-0.2%	✅
.NET 6 - Baseline
process.internal_duration_ms	21.36 ± (21.30 - 21.43) ms	20.84 ± (20.81 - 20.88) ms	-2.4%	✅
process.time_to_main_ms	74.96 ± (74.66 - 75.26) ms	71.37 ± (71.20 - 71.54) ms	-4.8%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.70 ± (10.70 - 10.70) MB	10.73 ± (10.73 - 10.73) MB	+0.3%	✅⬆️
runtime.dotnet.threads.count	10 ± (10 - 10)	10 ± (10 - 10)	+0.0%	✅
.NET 6 - Bailout
process.internal_duration_ms	20.87 ± (20.85 - 20.90) ms	21.10 ± (21.04 - 21.15) ms	+1.1%	✅⬆️
process.time_to_main_ms	72.73 ± (72.57 - 72.89) ms	74.51 ± (74.18 - 74.84) ms	+2.4%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.83 ± (10.82 - 10.83) MB	10.85 ± (10.84 - 10.85) MB	+0.2%	✅⬆️
runtime.dotnet.threads.count	11 ± (11 - 11)	11 ± (11 - 11)	+0.0%	✅
.NET 6 - CallTarget+Inlining+NGEN
process.internal_duration_ms	373.24 ± (371.12 - 375.37) ms	372.57 ± (370.46 - 374.67) ms	-0.2%	✅
process.time_to_main_ms	546.63 ± (545.20 - 548.07) ms	545.98 ± (544.58 - 547.37) ms	-0.1%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	50.56 ± (50.54 - 50.58) MB	50.53 ± (50.51 - 50.55) MB	-0.1%	✅
runtime.dotnet.threads.count	28 ± (28 - 28)	28 ± (28 - 28)	+0.2%	✅⬆️
.NET 8 - Baseline
process.internal_duration_ms	19.41 ± (19.36 - 19.46) ms	19.27 ± (19.23 - 19.31) ms	-0.8%	✅
process.time_to_main_ms	72.20 ± (71.89 - 72.51) ms	71.69 ± (71.44 - 71.93) ms	-0.7%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	7.76 ± (7.76 - 7.77) MB	7.78 ± (7.77 - 7.78) MB	+0.2%	✅⬆️
runtime.dotnet.threads.count	10 ± (10 - 10)	10 ± (10 - 10)	+0.0%	✅
.NET 8 - Bailout
process.internal_duration_ms	19.50 ± (19.44 - 19.55) ms	19.07 ± (19.04 - 19.11) ms	-2.2%	✅
process.time_to_main_ms	74.80 ± (74.50 - 75.10) ms	71.43 ± (71.31 - 71.55) ms	-4.5%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	7.81 ± (7.81 - 7.82) MB	7.83 ± (7.82 - 7.84) MB	+0.3%	✅⬆️
runtime.dotnet.threads.count	11 ± (11 - 11)	11 ± (11 - 11)	+0.0%	✅
.NET 8 - CallTarget+Inlining+NGEN
process.internal_duration_ms	298.32 ± (296.24 - 300.40) ms	298.37 ± (295.72 - 301.01) ms	+0.0%	✅⬆️
process.time_to_main_ms	494.79 ± (493.62 - 495.96) ms	497.98 ± (496.49 - 499.46) ms	+0.6%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	38.00 ± (37.98 - 38.02) MB	37.95 ± (37.92 - 37.97) MB	-0.1%	✅
runtime.dotnet.threads.count	27 ± (27 - 27)	27 ± (27 - 27)	-0.0%	✅

HttpMessageHandler

Metric	Master (Mean ± 95% CI)	Current (Mean ± 95% CI)	Change	Status
.NET Framework 4.8 - Baseline
duration	232.20 ± (231.40 - 234.65) ms	246.62 ± (243.87 - 246.89) ms	+6.2%	✅⬆️
.NET Framework 4.8 - Bailout
duration	242.07 ± (241.73 - 244.05) ms	248.48 ± (245.40 - 248.97) ms	+2.7%	✅⬆️
.NET Framework 4.8 - CallTarget+Inlining+NGEN
duration	1303.77 ± (1300.91 - 1307.91) ms	1326.59 ± (1322.50 - 1332.20) ms	+1.7%	✅⬆️
.NET Core 3.1 - Baseline
process.internal_duration_ms	223.61 ± (222.10 - 225.13) ms	233.36 ± (231.64 - 235.07) ms	+4.4%	✅⬆️
process.time_to_main_ms	94.74 ± (94.30 - 95.18) ms	96.67 ± (96.20 - 97.14) ms	+2.0%	✅⬆️
runtime.dotnet.exceptions.count	3 ± (3 - 3)	3 ± (3 - 3)	+0.0%	✅
runtime.dotnet.mem.committed	15.87 ± (15.86 - 15.89) MB	15.99 ± (15.97 - 16.00) MB	+0.7%	✅⬆️
runtime.dotnet.threads.count	20 ± (20 - 20)	20 ± (20 - 20)	+0.2%	✅⬆️
.NET Core 3.1 - Bailout
process.internal_duration_ms	229.84 ± (228.31 - 231.38) ms	238.25 ± (236.81 - 239.70) ms	+3.7%	✅⬆️
process.time_to_main_ms	97.69 ± (97.23 - 98.16) ms	99.67 ± (99.21 - 100.14) ms	+2.0%	✅⬆️
runtime.dotnet.exceptions.count	3 ± (3 - 3)	3 ± (3 - 3)	+0.0%	✅
runtime.dotnet.mem.committed	15.92 ± (15.90 - 15.93) MB	15.99 ± (15.98 - 16.01) MB	+0.5%	✅⬆️
runtime.dotnet.threads.count	21 ± (21 - 21)	21 ± (21 - 21)	+0.4%	✅⬆️
.NET Core 3.1 - CallTarget+Inlining+NGEN
process.internal_duration_ms	418.52 ± (416.81 - 420.24) ms	417.59 ± (416.04 - 419.14) ms	-0.2%	✅
process.time_to_main_ms	586.02 ± (584.74 - 587.29) ms	586.80 ± (585.54 - 588.06) ms	+0.1%	✅⬆️
runtime.dotnet.exceptions.count	3 ± (3 - 3)	3 ± (3 - 3)	+0.0%	✅
runtime.dotnet.mem.committed	59.89 ± (59.85 - 59.93) MB	59.97 ± (59.92 - 60.01) MB	+0.1%	✅⬆️
runtime.dotnet.threads.count	30 ± (30 - 30)	30 ± (30 - 30)	-0.1%	✅
.NET 6 - Baseline
process.internal_duration_ms	233.75 ± (231.93 - 235.56) ms	233.96 ± (231.32 - 236.61) ms	+0.1%	✅⬆️
process.time_to_main_ms	82.32 ± (81.88 - 82.76) ms	83.88 ± (83.42 - 84.34) ms	+1.9%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.4%	✅⬆️
runtime.dotnet.mem.committed	16.29 ± (16.27 - 16.31) MB	16.22 ± (16.20 - 16.24) MB	-0.4%	✅
runtime.dotnet.threads.count	20 ± (19 - 20)	19 ± (19 - 20)	-0.2%	✅
.NET 6 - Bailout
process.internal_duration_ms	227.17 ± (225.66 - 228.68) ms	242.91 ± (241.04 - 244.78) ms	+6.9%	✅⬆️
process.time_to_main_ms	83.70 ± (83.34 - 84.05) ms	85.02 ± (84.64 - 85.40) ms	+1.6%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.4%	✅⬆️
runtime.dotnet.mem.committed	16.32 ± (16.31 - 16.34) MB	16.26 ± (16.25 - 16.28) MB	-0.4%	✅
runtime.dotnet.threads.count	21 ± (21 - 21)	20 ± (20 - 21)	-0.4%	✅
.NET 6 - CallTarget+Inlining+NGEN
process.internal_duration_ms	664.62 ± (655.52 - 673.71) ms	645.76 ± (637.06 - 654.46) ms	-2.8%	✅
process.time_to_main_ms	604.56 ± (602.96 - 606.16) ms	603.20 ± (601.60 - 604.80) ms	-0.2%	✅
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	62.54 ± (62.44 - 62.63) MB	62.51 ± (62.42 - 62.61) MB	-0.0%	✅
runtime.dotnet.threads.count	31 ± (31 - 31)	31 ± (31 - 31)	-0.1%	✅
.NET 8 - Baseline
process.internal_duration_ms	252.58 ± (250.87 - 254.30) ms	237.61 ± (235.49 - 239.73) ms	-5.9%	✅
process.time_to_main_ms	84.14 ± (83.75 - 84.52) ms	82.43 ± (82.11 - 82.76) ms	-2.0%	✅
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	-0.4%	✅
runtime.dotnet.mem.committed	11.42 ± (11.40 - 11.43) MB	11.49 ± (11.47 - 11.51) MB	+0.6%	✅⬆️
runtime.dotnet.threads.count	19 ± (19 - 19)	19 ± (19 - 19)	+0.1%	✅⬆️
.NET 8 - Bailout
process.internal_duration_ms	250.19 ± (248.32 - 252.06) ms	230.55 ± (228.97 - 232.13) ms	-7.9%	✅
process.time_to_main_ms	85.04 ± (84.67 - 85.41) ms	83.97 ± (83.66 - 84.27) ms	-1.3%	✅
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.3%	✅⬆️
runtime.dotnet.mem.committed	11.48 ± (11.46 - 11.50) MB	11.58 ± (11.56 - 11.59) MB	+0.8%	✅⬆️
runtime.dotnet.threads.count	20 ± (20 - 20)	20 ± (20 - 20)	+0.1%	✅⬆️
.NET 8 - CallTarget+Inlining+NGEN
process.internal_duration_ms	619.41 ± (615.64 - 623.18) ms	618.34 ± (614.38 - 622.29) ms	-0.2%	✅
process.time_to_main_ms	557.52 ± (556.04 - 559.00) ms	557.83 ± (556.24 - 559.42) ms	+0.1%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	52.33 ± (52.29 - 52.37) MB	52.37 ± (52.32 - 52.42) MB	+0.1%	✅⬆️
runtime.dotnet.threads.count	30 ± (30 - 30)	30 ± (30 - 30)	-0.1%	✅

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 (8925) - mean (75ms)  : 70, 80
    master - mean (71ms)  : 69, 74

    section Bailout
    This PR (8925) - mean (79ms)  : 75, 83
    master - mean (75ms)  : 73, 77

    section CallTarget+Inlining+NGEN
    This PR (8925) - mean (1,093ms)  : 1040, 1146
    master - mean (1,098ms)  : 1047, 1150

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 (8925) - mean (116ms)  : 111, 121
    master - mean (111ms)  : 107, 114

    section Bailout
    This PR (8925) - mean (112ms)  : 110, 115
    master - mean (111ms)  : 109, 113

    section CallTarget+Inlining+NGEN
    This PR (8925) - mean (791ms)  : 768, 815
    master - mean (789ms)  : 766, 813

FakeDbCommand (.NET 6)

gantt
    title Execution time (ms) FakeDbCommand (.NET 6)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8925) - mean (98ms)  : 95, 101
    master - mean (103ms)  : 97, 109

    section Bailout
    This PR (8925) - mean (102ms)  : 95, 110
    master - mean (100ms)  : 96, 103

    section CallTarget+Inlining+NGEN
    This PR (8925) - mean (949ms)  : 910, 987
    master - mean (953ms)  : 903, 1002

FakeDbCommand (.NET 8)

gantt
    title Execution time (ms) FakeDbCommand (.NET 8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8925) - mean (98ms)  : 93, 103
    master - mean (99ms)  : 93, 105

    section Bailout
    This PR (8925) - mean (97ms)  : 95, 99
    master - mean (102ms)  : 96, 109

    section CallTarget+Inlining+NGEN
    This PR (8925) - mean (831ms)  : 777, 885
    master - mean (826ms)  : 782, 870

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 (8925) - mean (245ms)  : 223, 268
    master - mean (233ms)  : 208, 258

    section Bailout
    This PR (8925) - mean (247ms)  : 220, 274
    master - mean (243ms)  : 226, 259

    section CallTarget+Inlining+NGEN
    This PR (8925) - mean (1,327ms)  : 1255, 1400
    master - mean (1,304ms)  : 1254, 1355

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 (8925) - mean (342ms)  : 308, 375
    master - mean (329ms)  : 303, 354

    section Bailout
    This PR (8925) - mean (351ms)  : 321, 380
    master - mean (339ms)  : 312, 365

    section CallTarget+Inlining+NGEN
    This PR (8925) - mean (1,047ms)  : 1014, 1081
    master - mean (1,047ms)  : 1008, 1087

HttpMessageHandler (.NET 6)

gantt
    title Execution time (ms) HttpMessageHandler (.NET 6)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8925) - mean (329ms)  : 285, 373
    master - mean (326ms)  : 303, 349

    section Bailout
    This PR (8925) - mean (338ms)  : 308, 368
    master - mean (320ms)  : 296, 345

    section CallTarget+Inlining+NGEN
    This PR (8925) - mean (1,290ms)  : 1155, 1425
    master - mean (1,317ms)  : 1189, 1445

HttpMessageHandler (.NET 8)

gantt
    title Execution time (ms) HttpMessageHandler (.NET 8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (8925) - mean (332ms)  : 299, 365
    master - mean (350ms)  : 323, 378

    section Bailout
    This PR (8925) - mean (327ms)  : 298, 356
    master - mean (349ms)  : 312, 385

    section CallTarget+Inlining+NGEN
    This PR (8925) - mean (1,214ms)  : 1146, 1283
    master - mean (1,216ms)  : 1155, 1277

Use multiprocessor compilation

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Use multiprocessor compilation#8925

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NachoEchevarria commented Jul 22, 2026

Summary of changes

Reason for change

Implementation details

Test coverage

Other details

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Execution-Time Benchmarks Report ⏱️

FakeDbCommand

HttpMessageHandler

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dd-trace-dotnet-ci-bot Bot commented Jul 22, 2026 •

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