What version of Go are you using (go version)?

$ go version
go version go1.17 linux/amd64

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

$ go env
GOARCH="amd64"
GOOS="linux"
CGO_ENABLED="0"

cpu: Intel(R) Core(TM) i5-9400 CPU @ 2.90GHz

What did you do?

I ran the benchmark in versions 1.16.4, 1.15.15 and 1.17.0 and saw a decrease in the execution speed

func testFnInt(x, y int) {
	v := x + y
	x = x + y
	y = v * x
}

func testSlice(v []int) {
	for id, val := range v {
		testFnInt(id, val)
	}
}

func Benchmark_IntF(b *testing.B) {
	v := []int{11, 22, 55, 1, -11, 0, 22}

	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		testSlice(v)
	}
}

go test -benchmem -bench=. test/bench_test.go

What did you expect to see?

no difference or very minimal difference at all

What did you see instead?

1.15.15

Benchmark_IntF-6        322077016                3.57 ns/op            0 B/op          0 allocs/op
Benchmark_IntF-6        325528543                3.66 ns/op            0 B/op          0 allocs/op
Benchmark_IntF-6        325288412                3.72 ns/op            0 B/op          0 allocs/op
Benchmark_IntF-6        329647598                3.70 ns/op            0 B/op          0 allocs/op
Benchmark_IntF-6        326699432                3.71 ns/op            0 B/op          0 allocs/op

1.16.4

Benchmark_IntF-6   	328683681	         3.674 ns/op	       0 B/op	       0 allocs/op
Benchmark_IntF-6   	329477650	         3.658 ns/op	       0 B/op	       0 allocs/op
Benchmark_IntF-6          320231263                3.666 ns/op           0 B/op             0 allocs/op
Benchmark_IntF-6          330243132                3.636 ns/op           0 B/op             0 allocs/op
Benchmark_IntF-6          326361471                3.663 ns/op           0 B/op          0 allocs/op

1.17.0

Benchmark_IntF-6   	290349687	         4.114 ns/op	       0 B/op	       0 allocs/op
Benchmark_IntF-6   	290900883	         4.116 ns/op	       0 B/op	       0 allocs/op
Benchmark_IntF-6   	290776753	         4.114 ns/op	       0 B/op	       0 allocs/op
Benchmark_IntF-6   	290126416	         4.136 ns/op	       0 B/op	       0 allocs/op
Benchmark_IntF-6   	289591995	         4.171 ns/op	       0 B/op	       0 allocs/op