math/big: add benchmarks for big.Float String
In addition to the DecimalConversion benchmark, that exercises the
String method of the internal decimal type on a range of small shifts,
add a few benchmarks for the big.Float String method. They can be used
to obtain more realistic data on the real-world performance of
big.Float printing.
Change-Id: I7ada324e7603cb1ce7492ccaf3382db0096223ba
Reviewed-on: https://go-review.googlesource.com/31275
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/src/math/big/decimal_test.go b/src/math/big/decimal_test.go
index 13452f8..424811e 100644
--- a/src/math/big/decimal_test.go
+++ b/src/math/big/decimal_test.go
@@ -4,7 +4,10 @@
package big
-import "testing"
+import (
+ "fmt"
+ "testing"
+)
func TestDecimalString(t *testing.T) {
for _, test := range []struct {
@@ -116,3 +119,16 @@
}
}
}
+
+func BenchmarkFloatString(b *testing.B) {
+ x := new(Float)
+ for _, prec := range []uint{1e2, 1e3, 1e4, 1e5} {
+ x.SetPrec(prec).SetRat(NewRat(1, 3))
+ b.Run(fmt.Sprintf("%v", prec), func(b *testing.B) {
+ b.ReportAllocs()
+ for i := 0; i < b.N; i++ {
+ sink = x.String()
+ }
+ })
+ }
+}
