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go.perf
Commit 83910fa1 authored by Russ Cox's avatar Russ Cox
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benchstat: split scalers into scaler.go 

Change-Id: I20d5f0e2cebef4f577074b45b7849a2698310909
Reviewed-on: https://go-review.googlesource.com/35934Reviewed-by: default avatarQuentin Smith <quentin@golang.org>
parent bb5c1040
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Inline Side-by-side
Showing with 114 additions and 99 deletions
cmd/benchstat/main.go
View file @ 83910fa1
......@@ -185,7 +185,7 @@ func main() {
pval, testerr := deltaTest(old, new)
scaler := newScaler(old.Mean, old.Unit)
scaler := NewScaler(old.Mean, old.Unit)
row := newRow(key.Benchmark, old.Format(scaler), new.Format(scaler), "~ ")
if testerr == stats.ErrZeroVariance {
row.add("(zero variance)")
......@@ -227,7 +227,7 @@ func main() {
for _, key.Benchmark = range c.Benchmarks {
row := newRow(key.Benchmark)
var scaler func(float64) string
var scaler Scaler
for _, key.Config = range c.Configs {
m := c.Metrics[key]
if m == nil {
......@@ -235,7 +235,7 @@ func main() {
continue
}
if scaler == nil {
scaler = newScaler(m.Mean, m.Unit)
scaler = NewScaler(m.Mean, m.Unit)
}
row.add(m.Format(scaler))
}
......@@ -351,7 +351,7 @@ func addGeomean(table []*row, c *Collection, unit string, delta bool) []*row {
} else {
geomean := stats.GeoMean(means)
geomeans = append(geomeans, geomean)
row.add(newScaler(geomean, unit)(geomean) + " ")
row.add(NewScaler(geomean, unit)(geomean) + " ")
}
}
if delta {
......@@ -360,101 +360,7 @@ func addGeomean(table []*row, c *Collection, unit string, delta bool) []*row {
return append(table, row)
}
func timeScaler(ns float64) func(float64) string {
var format string
var scale float64
switch x := ns / 1e9; {
case x >= 99.5:
format, scale = "%.0fs", 1
case x >= 9.95:
format, scale = "%.1fs", 1
case x >= 0.995:
format, scale = "%.2fs", 1
case x >= 0.0995:
format, scale = "%.0fms", 1000
case x >= 0.00995:
format, scale = "%.1fms", 1000
case x >= 0.000995:
format, scale = "%.2fms", 1000
case x >= 0.0000995:
format, scale = "%.0fµs", 1000*1000
case x >= 0.00000995:
format, scale = "%.1fµs", 1000*1000
case x >= 0.000000995:
format, scale = "%.2fµs", 1000*1000
case x >= 0.0000000995:
format, scale = "%.0fns", 1000*1000*1000
case x >= 0.00000000995:
format, scale = "%.1fns", 1000*1000*1000
default:
format, scale = "%.2fns", 1000*1000*1000
}
return func(ns float64) string {
return fmt.Sprintf(format, ns/1e9*scale)
}
}
func newScaler(val float64, unit string) func(float64) string {
if unit == "ns/op" {
return timeScaler(val)
}
var format string
var scale float64
var suffix string
prescale := 1.0
if unit == "MB/s" {
prescale = 1e6
}
switch x := val * prescale; {
case x >= 99500000000000:
format, scale, suffix = "%.0f", 1e12, "T"
case x >= 9950000000000:
format, scale, suffix = "%.1f", 1e12, "T"
case x >= 995000000000:
format, scale, suffix = "%.2f", 1e12, "T"
case x >= 99500000000:
format, scale, suffix = "%.0f", 1e9, "G"
case x >= 9950000000:
format, scale, suffix = "%.1f", 1e9, "G"
case x >= 995000000:
format, scale, suffix = "%.2f", 1e9, "G"
case x >= 99500000:
format, scale, suffix = "%.0f", 1e6, "M"
case x >= 9950000:
format, scale, suffix = "%.1f", 1e6, "M"
case x >= 995000:
format, scale, suffix = "%.2f", 1e6, "M"
case x >= 99500:
format, scale, suffix = "%.0f", 1e3, "k"
case x >= 9950:
format, scale, suffix = "%.1f", 1e3, "k"
case x >= 995:
format, scale, suffix = "%.2f", 1e3, "k"
case x >= 99.5:
format, scale, suffix = "%.0f", 1, ""
case x >= 9.95:
format, scale, suffix = "%.1f", 1, ""
default:
format, scale, suffix = "%.2f", 1, ""
}
if unit == "B/op" {
suffix += "B"
}
if unit == "MB/s" {
suffix += "B/s"
}
scale /= prescale
return func(val float64) string {
return fmt.Sprintf(format+suffix, val/scale)
}
}
func (m *Metrics) Format(scaler func(float64) string) string {
func (m *Metrics) Format(scaler Scaler) string {
diff := 1 - m.Min/m.Mean
if d := m.Max/m.Mean - 1; d > diff {
diff = d
......
cmd/benchstat/scaler.go 0 → 100644
View file @ 83910fa1
// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import "fmt"
// A Scaler is a function that scales and formats a measurement.
// All measurements within a given table row are formatted
// using the same scaler, so that the units are consistent
// across the row.
type Scaler func(float64) string
// NewScaler returns a Scaler appropriate for formatting
// the measurement val, which has the given unit.
func NewScaler(val float64, unit string) Scaler {
if unit == "ns/op" {
return timeScaler(val)
}
var format string
var scale float64
var suffix string
prescale := 1.0
if unit == "MB/s" {
prescale = 1e6
}
switch x := val * prescale; {
case x >= 99500000000000:
format, scale, suffix = "%.0f", 1e12, "T"
case x >= 9950000000000:
format, scale, suffix = "%.1f", 1e12, "T"
case x >= 995000000000:
format, scale, suffix = "%.2f", 1e12, "T"
case x >= 99500000000:
format, scale, suffix = "%.0f", 1e9, "G"
case x >= 9950000000:
format, scale, suffix = "%.1f", 1e9, "G"
case x >= 995000000:
format, scale, suffix = "%.2f", 1e9, "G"
case x >= 99500000:
format, scale, suffix = "%.0f", 1e6, "M"
case x >= 9950000:
format, scale, suffix = "%.1f", 1e6, "M"
case x >= 995000:
format, scale, suffix = "%.2f", 1e6, "M"
case x >= 99500:
format, scale, suffix = "%.0f", 1e3, "k"
case x >= 9950:
format, scale, suffix = "%.1f", 1e3, "k"
case x >= 995:
format, scale, suffix = "%.2f", 1e3, "k"
case x >= 99.5:
format, scale, suffix = "%.0f", 1, ""
case x >= 9.95:
format, scale, suffix = "%.1f", 1, ""
default:
format, scale, suffix = "%.2f", 1, ""
}
if unit == "B/op" {
suffix += "B"
}
if unit == "MB/s" {
suffix += "B/s"
}
scale /= prescale
return func(val float64) string {
return fmt.Sprintf(format+suffix, val/scale)
}
}
func timeScaler(ns float64) Scaler {
var format string
var scale float64
switch x := ns / 1e9; {
case x >= 99.5:
format, scale = "%.0fs", 1
case x >= 9.95:
format, scale = "%.1fs", 1
case x >= 0.995:
format, scale = "%.2fs", 1
case x >= 0.0995:
format, scale = "%.0fms", 1000
case x >= 0.00995:
format, scale = "%.1fms", 1000
case x >= 0.000995:
format, scale = "%.2fms", 1000
case x >= 0.0000995:
format, scale = "%.0fµs", 1000*1000
case x >= 0.00000995:
format, scale = "%.1fµs", 1000*1000
case x >= 0.000000995:
format, scale = "%.2fµs", 1000*1000
case x >= 0.0000000995:
format, scale = "%.0fns", 1000*1000*1000
case x >= 0.00000000995:
format, scale = "%.1fns", 1000*1000*1000
default:
format, scale = "%.2fns", 1000*1000*1000
}
return func(ns float64) string {
return fmt.Sprintf(format, ns/1e9*scale)
}
}
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