tree a8da160bef8013dc018847a15181315910862d3e
parent bacb2583bd66e4fd1907a1376f8c883bc31397c2
author Jonathan Amsterdam <jba@google.com> 1622982102 -0400
committer Jonathan Amsterdam <jba@google.com> 1623090018 +0000

event: add benchmarks for context lookups

See how much it costs to look up the exporter in the context.

The results (see below) show that with a context chain of length 10,
doing a context lookup is about 20% slower than not.

go test -v -run XXX -bench BuildContext
goos: linux
goarch: amd64
pkg: golang.org/x/exp/event
cpu: Intel(R) Xeon(R) CPU @ 2.30GHz
BenchmarkBuildContext
BenchmarkBuildContext/depth_1
BenchmarkBuildContext/depth_1/with
BenchmarkBuildContext/depth_1/with-8             6222020               192.8 ns/op
BenchmarkBuildContext/depth_1/without
BenchmarkBuildContext/depth_1/without-8          5743065               182.9 ns/op
BenchmarkBuildContext/depth_5
BenchmarkBuildContext/depth_5/with
BenchmarkBuildContext/depth_5/with-8             6233917               184.8 ns/op
BenchmarkBuildContext/depth_5/without
BenchmarkBuildContext/depth_5/without-8          7289814               165.8 ns/op
BenchmarkBuildContext/depth_7
BenchmarkBuildContext/depth_7/with
BenchmarkBuildContext/depth_7/with-8             5941093               193.5 ns/op
BenchmarkBuildContext/depth_7/without
BenchmarkBuildContext/depth_7/without-8          7317411               167.6 ns/op
BenchmarkBuildContext/depth_10
BenchmarkBuildContext/depth_10/with
BenchmarkBuildContext/depth_10/with-8            5709080               207.0 ns/op
BenchmarkBuildContext/depth_10/without
BenchmarkBuildContext/depth_10/without-8                 7281186               168.9 ns/op

Change-Id: If38409916240dd15d4924505aa80f98c107830e4
Reviewed-on: https://go-review.googlesource.com/c/exp/+/325489
Trust: Jonathan Amsterdam <jba@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Cottrell <iancottrell@google.com>