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perf: speed up overlay performance ~200-40000x depending on the size of the document#17
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ThomasRooney merged 3 commits intomainfrom Jul 7, 2025
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perf: speed up overlay performance ~200-40000x depending on the size of the document#17ThomasRooney merged 3 commits intomainfrom
ThomasRooney merged 3 commits intomainfrom
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TristanSpeakEasy
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| module github.com/speakeasy-api/openapi-overlay | ||
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| go 1.22 | ||
| go 1.24 |
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Did we need to bump this (and in a patch version)?
Coming from oapi-codegen/oapi-codegen#2017 and we try and keep a go directive compatability where possible, so this was a surprise to see in a patch release
(it's a great patch to improve performance 👏🏽)
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Context:
Strict Mode effectively produced a warning when there was an overlay action that didn't do anything.
It was done by serialising the document before and after each change and doing a comparison. Super inefficient.
This makes it work by returning back a "didChange" boolean all the way from applyNode depending on the kind of change that happened.
From:
cpu: Apple M3 Max
BenchmarkApplyToStrictBySize
BenchmarkApplyToStrictBySize/2KB
apply_test.go:206: OpenAPI size: 16911 bytes (target: 2048, paths added: 0)
BenchmarkApplyToStrictBySize/2KB-14 738 1600568 ns/op
BenchmarkApplyToStrictBySize/20KB
apply_test.go:206: OpenAPI size: 22741 bytes (target: 20480, paths added: 16)
BenchmarkApplyToStrictBySize/20KB-14 493 2377933 ns/op
BenchmarkApplyToStrictBySize/200KB
apply_test.go:206: OpenAPI size: 245551 bytes (target: 204800, paths added: 625)
BenchmarkApplyToStrictBySize/200KB-14 48 23456246 ns/op
BenchmarkApplyToStrictBySize/2M
apply_test.go:206: OpenAPI size: 2477637 bytes (target: 2048000, paths added: 6708)
BenchmarkApplyToStrictBySize/2M-14 5 235112558 ns/op
PASS
To:
BenchmarkApplyToStrictBySize
BenchmarkApplyToStrictBySize/2KB
apply_test.go:206: OpenAPI size: 16911 bytes (target: 2048, paths added: 0)
BenchmarkApplyToStrictBySize/2KB-14 200113 6067 ns/op
BenchmarkApplyToStrictBySize/20KB
apply_test.go:206: OpenAPI size: 22741 bytes (target: 20480, paths added: 16)
BenchmarkApplyToStrictBySize/20KB-14 192753 6248 ns/op
BenchmarkApplyToStrictBySize/200KB
apply_test.go:206: OpenAPI size: 245551 bytes (target: 204800, paths added: 625)
BenchmarkApplyToStrictBySize/200KB-14 170931 7046 ns/op
BenchmarkApplyToStrictBySize/2M
apply_test.go:206: OpenAPI size: 2477637 bytes (target: 2048000, paths added: 6708)
BenchmarkApplyToStrictBySize/2M-14 216870 5873 ns/op
PASS