b.santos/gopl.io
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ch2/popcount: show go1.7 SSA benchmarks

Browse Source 
Change-Id: I1e9b29320e938a1dc8763f66b243c1a08f33b7d7
This commit is contained in:
Alan Donovan
2016-12-06 17:57:29 -05:00
parent 4cccb408fa
commit b725d6015f
1 changed files with 9 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
ch2/popcount/popcount_test.go
View File

@@ -67,17 +67,23 @@ func BenchmarkPopCountByShifting(b *testing.B) {
} }
} }
// 2.67GHz Xeon // Go 1.6, 2.67GHz Xeon
// $ go test -cpu=4 -bench=. gopl.io/ch2/popcount // $ go test -cpu=4 -bench=. gopl.io/ch2/popcount
// BenchmarkPopCount-4 200000000 6.30 ns/op // BenchmarkPopCount-4 200000000 6.30 ns/op
// BenchmarkBitCount-4 300000000 4.15 ns/op // BenchmarkBitCount-4 300000000 4.15 ns/op
// BenchmarkPopCountByClearing-4 30000000 45.2 ns/op // BenchmarkPopCountByClearing-4 30000000 45.2 ns/op
// BenchmarkPopCountByShifting-4 10000000 153 ns/op // BenchmarkPopCountByShifting-4 10000000 153 ns/op
// //
// 2.5GHz Intel Core i5 // Go 1.6, 2.5GHz Intel Core i5
// $ go test -cpu=4 -bench=. gopl.io/ch2/popcount // $ go test -cpu=4 -bench=. gopl.io/ch2/popcount
// testing: warning: no tests to run
// BenchmarkPopCount-4 200000000 7.52 ns/op // BenchmarkPopCount-4 200000000 7.52 ns/op
// BenchmarkBitCount-4 500000000 3.36 ns/op // BenchmarkBitCount-4 500000000 3.36 ns/op
// BenchmarkPopCountByClearing-4 50000000 34.3 ns/op // BenchmarkPopCountByClearing-4 50000000 34.3 ns/op
// BenchmarkPopCountByShifting-4 20000000 108 ns/op // BenchmarkPopCountByShifting-4 20000000 108 ns/op
//
// Go 1.7, 3.5GHz Xeon
// $ go test -cpu=4 -bench=. gopl.io/ch2/popcount
// BenchmarkPopCount-12 2000000000 0.28 ns/op
// BenchmarkBitCount-12 2000000000 0.27 ns/op
// BenchmarkPopCountByClearing-12 100000000 18.5 ns/op
// BenchmarkPopCountByShifting-12 20000000 70.1 ns/op