Improve the performance of schedulinggates

[sourcelliu]

What type of PR is this?

/kind cleanup
/sig scheduling

What this PR does / why we need it:

I wrote a benchmak in my local env, like this:

func BenchmarkPreEnqueue(b *testing.B) {
	b.ResetTimer()
	p, _ := New(nil, nil, feature.Features{EnablePodSchedulingReadiness: true})
	pod := st.MakePod().Name("p").SchedulingGates([]string{"foo", "bar", "a", "b", "c"}).Obj()
	for i := 0; i < b.N; i++ {
		p.(framework.PreEnqueuePlugin).PreEnqueue(context.Background(), pod)
	}
}

• original:

goos: darwin
goarch: amd64
pkg: k8s.io/kubernetes/pkg/scheduler/framework/plugins/schedulinggates
cpu: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
BenchmarkPreEnqueue-16    	 1220508	       993.1 ns/op	     472 B/op	      13 allocs/op
BenchmarkPreEnqueue-16    	 1000000	      1028 ns/op	     472 B/op	      13 allocs/op
BenchmarkPreEnqueue-16    	 1000000	      1029 ns/op	     472 B/op	      13 allocs/op
BenchmarkPreEnqueue-16    	 1000000	      1020 ns/op	     472 B/op	      13 allocs/op

• PR:

goos: darwin
goarch: amd64
pkg: k8s.io/kubernetes/pkg/scheduler/framework/plugins/schedulinggates
cpu: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
BenchmarkPreEnqueue-16    	 1437207	       796.2 ns/op	     312 B/op	      10 allocs/op
BenchmarkPreEnqueue-16    	 1521619	       795.2 ns/op	     312 B/op	      10 allocs/op
BenchmarkPreEnqueue-16    	 1519863	       784.1 ns/op	     312 B/op	      10 allocs/op
BenchmarkPreEnqueue-16    	 1523612	       799.1 ns/op	     312 B/op	      10 allocs/op

The execution time of the PR version is reduced by 20% compared to the master version.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

This issue is currently awaiting triage.

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[k8s-ci-robot]

Hi @sourcelliu. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[dims]

/ok-to-test

[chendave]

/assign

[chendave]

/lgtm

double checked.

@kubernetes/sig-scheduling-approvers someone from the list pls help to approve.

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 92a473f90efb941977782435522bbcd9e94cbae9

[sanposhiho]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chendave, sanposhiho, sourcelliu

The full list of commands accepted by this bot can be found here.

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• pkg/scheduler/OWNERS [sanposhiho]

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