trace: optimize id parsing and string functions #6791
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jschaf
requested review from
MrAlias,
XSAM,
dashpole,
pellared and
dmathieu
as code owners
With specialized routines, we can avoid the allocation of hex.DecodeString since we know the structure of the IDs. We can use `==` instead of bytes.Equal for arrays. From the Go [spec]: > Array types are comparable if their array element types are comparable. Two > array values are equal if their corresponding element values are equal. The > elements are compared in ascending index order, and comparison stops as soon > as two element values differ (or all elements have been compared). [spec]: https://go.dev/ref/spec#Comparison_operators ### Benchstat To generate: ```sh mkdir private cd sdk go test -run=xxxxMatchNothingxxxx -bench=. -count=10 go.opentelemetry.io/otel/sdk/trace -timeout=30m | tee ../private/base.txt go test -run=xxxxMatchNothingxxxx -bench=. -count=10 go.opentelemetry.io/otel/sdk/trace -timeout=30m | tee ../private/new.txt benchstat ../private/base.txt ../private/new.txt ``` Results: ``` goos: darwin goarch: arm64 pkg: go.opentelemetry.io/otel/sdk/trace cpu: Apple M2 Max │ ../private/base.txt │ ../private/new.txt │ │ sec/op │ sec/op vs base │ Truncate/Unlimited-12 0.2086n ± 1% 0.2140n ± 3% +2.59% (p=0.017 n=10) Truncate/Zero-12 0.3048n ± 0% 0.3070n ± 1% +0.71% (p=0.014 n=10) Truncate/Short-12 0.2083n ± 2% 0.2097n ± 1% ~ (p=0.148 n=10) Truncate/ASCII-12 0.6870n ± 0% 0.6855n ± 0% ~ (p=0.493 n=10) Truncate/ValidUTF-8-12 1.298n ± 0% 1.302n ± 1% +0.31% (p=0.003 n=10) Truncate/InvalidUTF-8-12 9.457n ± 0% 9.420n ± 1% ~ (p=0.529 n=10) Truncate/MixedUTF-8-12 17.30n ± 1% 17.29n ± 0% ~ (p=0.359 n=10) RecordingSpanSetAttributes/WithLimit/false-12 2.055µ ± 1% 2.082µ ± 9% +1.29% (p=0.014 n=10) RecordingSpanSetAttributes/WithLimit/true-12 4.368µ ± 0% 4.364µ ± 0% -0.08% (p=0.049 n=10) SpanEnd-12 72.57n ± 17% 73.75n ± 16% ~ (p=0.853 n=10) TraceStart/with_a_simple_span-12 320.1n ± 10% 314.6n ± 10% ~ (p=0.165 n=10) TraceStart/with_several_links-12 432.7n ± 2% 429.4n ± 1% ~ (p=0.063 n=10) TraceStart/with_attributes-12 477.3n ± 1% 468.1n ± 6% -1.94% (p=0.005 n=10) SpanLimits/AttributeValueLengthLimit-12 4.401µ ± 1% 4.439µ ± 2% ~ (p=0.089 n=10) SpanLimits/AttributeCountLimit-12 4.125µ ± 1% 4.151µ ± 1% +0.62% (p=0.014 n=10) SpanLimits/EventCountLimit-12 3.900µ ± 2% 3.935µ ± 1% +0.88% (p=0.023 n=10) SpanLimits/LinkCountLimit-12 3.870µ ± 2% 3.901µ ± 1% ~ (p=0.148 n=10) SpanLimits/AttributePerEventCountLimit-12 4.212µ ± 1% 4.243µ ± 1% +0.75% (p=0.008 n=10) SpanLimits/AttributePerLinkCountLimit-12 4.200µ ± 1% 4.224µ ± 0% +0.57% (p=0.041 n=10) SpanSetAttributesOverCapacity-12 1.661µ ± 1% 1.653µ ± 0% -0.48% (p=0.049 n=10) StartEndSpan/AlwaysSample-12 317.9n ± 0% 316.5n ± 0% -0.44% (p=0.007 n=10) StartEndSpan/NeverSample-12 152.3n ± 0% 152.0n ± 0% -0.23% (p=0.005 n=10) SpanWithAttributes_4/AlwaysSample-12 527.2n ± 0% 532.4n ± 1% +1.00% (p=0.000 n=10) SpanWithAttributes_4/NeverSample-12 240.6n ± 0% 241.6n ± 0% +0.46% (p=0.000 n=10) SpanWithAttributes_8/AlwaysSample-12 704.5n ± 0% 718.3n ± 1% +1.97% (p=0.000 n=10) SpanWithAttributes_8/NeverSample-12 325.0n ± 0% 327.2n ± 1% +0.68% (p=0.000 n=10) SpanWithAttributes_all/AlwaysSample-12 576.8n ± 0% 584.7n ± 1% +1.37% (p=0.000 n=10) SpanWithAttributes_all/NeverSample-12 264.6n ± 1% 263.3n ± 0% -0.47% (p=0.045 n=10) SpanWithAttributes_all_2x/AlwaysSample-12 818.6n ± 1% 834.9n ± 0% +1.98% (p=0.000 n=10) SpanWithAttributes_all_2x/NeverSample-12 378.3n ± 0% 382.9n ± 1% +1.23% (p=0.000 n=10) SpanWithEvents_4/AlwaysSample-12 715.1n ± 1% 721.1n ± 0% +0.83% (p=0.003 n=10) SpanWithEvents_4/NeverSample-12 156.1n ± 1% 155.1n ± 1% -0.64% (p=0.002 n=10) SpanWithEvents_8/AlwaysSample-12 1.098µ ± 0% 1.104µ ± 0% +0.55% (p=0.000 n=10) SpanWithEvents_8/NeverSample-12 158.8n ± 0% 158.6n ± 1% ~ (p=0.288 n=10) SpanWithEvents_WithStackTrace/AlwaysSample-12 438.8n ± 0% 438.5n ± 0% ~ (p=0.868 n=10) SpanWithEvents_WithStackTrace/NeverSample-12 168.2n ± 1% 167.4n ± 1% -0.48% (p=0.014 n=10) SpanWithEvents_WithTimestamp/AlwaysSample-12 430.6n ± 0% 432.9n ± 0% +0.53% (p=0.001 n=10) SpanWithEvents_WithTimestamp/NeverSample-12 193.7n ± 0% 190.1n ± 1% -1.91% (p=0.000 n=10) TraceID_DotString-12 42.37n ± 0% 24.80n ± 0% -41.45% (p=0.000 n=10) SpanID_DotString-12 31.30n ± 0% 17.22n ± 0% -44.98% (p=0.000 n=10) SpanProcessorOnEnd/batch:_10,_spans:_10-12 163.3n ± 0% 163.4n ± 0% ~ (p=0.120 n=10) SpanProcessorOnEnd/batch:_10,_spans:_100-12 1.639µ ± 0% 1.635µ ± 0% -0.27% (p=0.000 n=10) SpanProcessorOnEnd/batch:_100,_spans:_10-12 163.3n ± 0% 163.2n ± 0% ~ (p=0.115 n=10) SpanProcessorOnEnd/batch:_100,_spans:_100-12 1.636µ ± 0% 1.635µ ± 1% ~ (p=0.509 n=10) SpanProcessorVerboseLogging-12 6.769µ ± 2% 6.600µ ± 2% -2.49% (p=0.030 n=10) geomean 221.4n 216.4n -2.29% │ ../private/base.txt │ ../private/new.txt │ │ B/op │ B/op vs base │ Truncate/Unlimited-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/Zero-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/Short-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/ASCII-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/ValidUTF-8-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/InvalidUTF-8-12 16.00 ± 0% 16.00 ± 0% ~ (p=1.000 n=10) ¹ Truncate/MixedUTF-8-12 32.00 ± 0% 32.00 ± 0% ~ (p=1.000 n=10) ¹ RecordingSpanSetAttributes/WithLimit/false-12 6.891Ki ± 0% 6.891Ki ± 0% ~ (p=1.000 n=10) ¹ RecordingSpanSetAttributes/WithLimit/true-12 7.023Ki ± 0% 7.023Ki ± 0% ~ (p=1.000 n=10) ¹ SpanEnd-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ TraceStart/with_a_simple_span-12 528.0 ± 0% 528.0 ± 0% ~ (p=1.000 n=10) ¹ TraceStart/with_several_links-12 704.0 ± 0% 704.0 ± 0% ~ (p=1.000 n=10) ¹ TraceStart/with_attributes-12 784.0 ± 0% 784.0 ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/AttributeValueLengthLimit-12 10.56Ki ± 0% 10.56Ki ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/AttributeCountLimit-12 9.844Ki ± 0% 9.844Ki ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/EventCountLimit-12 9.422Ki ± 0% 9.422Ki ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/LinkCountLimit-12 9.031Ki ± 0% 9.031Ki ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/AttributePerEventCountLimit-12 10.47Ki ± 0% 10.47Ki ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/AttributePerLinkCountLimit-12 10.47Ki ± 0% 10.47Ki ± 0% ~ (p=1.000 n=10) ¹ SpanSetAttributesOverCapacity-12 592.0 ± 0% 592.0 ± 0% ~ (p=1.000 n=10) ¹ StartEndSpan/AlwaysSample-12 528.0 ± 0% 528.0 ± 0% ~ (p=1.000 n=10) ¹ StartEndSpan/NeverSample-12 144.0 ± 0% 144.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_4/AlwaysSample-12 1.016Ki ± 0% 1.016Ki ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_4/NeverSample-12 400.0 ± 0% 400.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_8/AlwaysSample-12 1.516Ki ± 0% 1.516Ki ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_8/NeverSample-12 656.0 ± 0% 656.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_all/AlwaysSample-12 1.141Ki ± 0% 1.141Ki ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_all/NeverSample-12 464.0 ± 0% 464.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_all_2x/AlwaysSample-12 1.891Ki ± 0% 1.891Ki ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_all_2x/NeverSample-12 848.0 ± 0% 848.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_4/AlwaysSample-12 1.016Ki ± 0% 1.016Ki ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_4/NeverSample-12 144.0 ± 0% 144.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_8/AlwaysSample-12 1.641Ki ± 0% 1.641Ki ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_8/NeverSample-12 144.0 ± 0% 144.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_WithStackTrace/AlwaysSample-12 624.0 ± 0% 624.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_WithStackTrace/NeverSample-12 160.0 ± 0% 160.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_WithTimestamp/AlwaysSample-12 648.0 ± 0% 648.0 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_WithTimestamp/NeverSample-12 184.0 ± 0% 184.0 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorOnEnd/batch:_10,_spans:_10-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorOnEnd/batch:_10,_spans:_100-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorOnEnd/batch:_100,_spans:_10-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorOnEnd/batch:_100,_spans:_100-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorVerboseLogging-12 9.547Ki ± 0% 9.547Ki ± 0% ~ (p=1.000 n=10) ¹ geomean ² +0.00% ² ¹ all samples are equal ² summaries must be >0 to compute geomean │ ../private/base.txt │ ../private/new.txt │ │ allocs/op │ allocs/op vs base │ Truncate/Unlimited-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/Zero-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/Short-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/ASCII-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/ValidUTF-8-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/InvalidUTF-8-12 1.000 ± 0% 1.000 ± 0% ~ (p=1.000 n=10) ¹ Truncate/MixedUTF-8-12 1.000 ± 0% 1.000 ± 0% ~ (p=1.000 n=10) ¹ RecordingSpanSetAttributes/WithLimit/false-12 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹ RecordingSpanSetAttributes/WithLimit/true-12 10.00 ± 0% 10.00 ± 0% ~ (p=1.000 n=10) ¹ SpanEnd-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ TraceStart/with_a_simple_span-12 2.000 ± 0% 2.000 ± 0% ~ (p=1.000 n=10) ¹ TraceStart/with_several_links-12 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹ TraceStart/with_attributes-12 4.000 ± 0% 4.000 ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/AttributeValueLengthLimit-12 41.00 ± 0% 41.00 ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/AttributeCountLimit-12 38.00 ± 0% 38.00 ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/EventCountLimit-12 35.00 ± 0% 35.00 ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/LinkCountLimit-12 35.00 ± 0% 35.00 ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/AttributePerEventCountLimit-12 38.00 ± 0% 38.00 ± 0% ~ (p=1.000 n=10) ¹ SpanLimits/AttributePerLinkCountLimit-12 38.00 ± 0% 38.00 ± 0% ~ (p=1.000 n=10) ¹ SpanSetAttributesOverCapacity-12 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹ StartEndSpan/AlwaysSample-12 2.000 ± 0% 2.000 ± 0% ~ (p=1.000 n=10) ¹ StartEndSpan/NeverSample-12 2.000 ± 0% 2.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_4/AlwaysSample-12 4.000 ± 0% 4.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_4/NeverSample-12 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_8/AlwaysSample-12 4.000 ± 0% 4.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_8/NeverSample-12 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_all/AlwaysSample-12 4.000 ± 0% 4.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_all/NeverSample-12 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_all_2x/AlwaysSample-12 4.000 ± 0% 4.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithAttributes_all_2x/NeverSample-12 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_4/AlwaysSample-12 5.000 ± 0% 5.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_4/NeverSample-12 2.000 ± 0% 2.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_8/AlwaysSample-12 6.000 ± 0% 6.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_8/NeverSample-12 2.000 ± 0% 2.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_WithStackTrace/AlwaysSample-12 4.000 ± 0% 4.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_WithStackTrace/NeverSample-12 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_WithTimestamp/AlwaysSample-12 5.000 ± 0% 5.000 ± 0% ~ (p=1.000 n=10) ¹ SpanWithEvents_WithTimestamp/NeverSample-12 4.000 ± 0% 4.000 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorOnEnd/batch:_10,_spans:_10-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorOnEnd/batch:_10,_spans:_100-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorOnEnd/batch:_100,_spans:_10-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorOnEnd/batch:_100,_spans:_100-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ SpanProcessorVerboseLogging-12 35.00 ± 0% 35.00 ± 0% ~ (p=1.000 n=10) ¹ geomean ² +0.00% ² ¹ all samples are equal ² summaries must be >0 to compute geomean ``` ### Benchstate for parsing ``` goos: darwin goarch: arm64 pkg: go.opentelemetry.io/otel/sdk/trace cpu: Apple M2 Max │ ../private/base_hex.txt │ ../private/new_hex.txt │ │ sec/op │ sec/op vs base │ TraceIDFromHex-12 56.47n ± 0% 15.96n ± 0% -71.74% (p=0.000 n=10) SpanIDFromHex-12 34.680n ± 0% 8.742n ± 1% -74.79% (p=0.000 n=10) geomean 44.26n 11.81n -73.31% │ ../private/base_hex.txt │ ../private/new_hex.txt │ │ B/op │ B/op vs base │ TraceIDFromHex-12 16.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10) SpanIDFromHex-12 8.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=10) geomean 11.31 ? ¹ ² ¹ summaries must be >0 to compute geomean ² ratios must be >0 to compute geomean │ ../private/base_hex.txt │ ../private/new_hex.txt │ │ allocs/op │ allocs/op vs base │ TraceIDFromHex-12 1.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=10) SpanIDFromHex-12 1.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=10) geomean 1.000 ? ¹ ² ¹ summaries must be >0 to compute geomean ² ratios must be >0 to compute geomean ``` Issue: open-telemetry#6721
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #6791 +/- ##
=====================================
Coverage 82.8% 82.8%
=====================================
Files 262 262
Lines 24339 24380 +41
=====================================
+ Hits 20153 20195 +42
Misses 3811 3811
+ Partials 375 374 -1
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With specialized routines, we can avoid the allocation of hex.DecodeString since we know the structure of the IDs.
We can use
==instead of bytes.Equal for arrays. From the Go spec:Benchstat
To generate:
Results:
Benchstat for parsing
Issue: #6721