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[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.1.0 / benchmark / parse / parse.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/benchmark/parse/parse.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/benchmark/parse/parse.go
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+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/benchmark/parse/parse.go
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+// Copyright 2014 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 parse provides support for parsing benchmark results as
+// generated by 'go test -bench'.
+package parse // import "golang.org/x/tools/benchmark/parse"
+
+import (
+       "bufio"
+       "bytes"
+       "fmt"
+       "io"
+       "strconv"
+       "strings"
+)
+
+// Flags used by Benchmark.Measured to indicate
+// which measurements a Benchmark contains.
+const (
+       NsPerOp = 1 << iota
+       MBPerS
+       AllocedBytesPerOp
+       AllocsPerOp
+)
+
+// Benchmark is one run of a single benchmark.
+type Benchmark struct {
+       Name              string  // benchmark name
+       N                 int     // number of iterations
+       NsPerOp           float64 // nanoseconds per iteration
+       AllocedBytesPerOp uint64  // bytes allocated per iteration
+       AllocsPerOp       uint64  // allocs per iteration
+       MBPerS            float64 // MB processed per second
+       Measured          int     // which measurements were recorded
+       Ord               int     // ordinal position within a benchmark run
+}
+
+// ParseLine extracts a Benchmark from a single line of testing.B
+// output.
+func ParseLine(line string) (*Benchmark, error) {
+       fields := strings.Fields(line)
+
+       // Two required, positional fields: Name and iterations.
+       if len(fields) < 2 {
+               return nil, fmt.Errorf("two fields required, have %d", len(fields))
+       }
+       if !strings.HasPrefix(fields[0], "Benchmark") {
+               return nil, fmt.Errorf(`first field does not start with "Benchmark"`)
+       }
+       n, err := strconv.Atoi(fields[1])
+       if err != nil {
+               return nil, err
+       }
+       b := &Benchmark{Name: fields[0], N: n}
+
+       // Parse any remaining pairs of fields; we've parsed one pair already.
+       for i := 1; i < len(fields)/2; i++ {
+               b.parseMeasurement(fields[i*2], fields[i*2+1])
+       }
+       return b, nil
+}
+
+func (b *Benchmark) parseMeasurement(quant string, unit string) {
+       switch unit {
+       case "ns/op":
+               if f, err := strconv.ParseFloat(quant, 64); err == nil {
+                       b.NsPerOp = f
+                       b.Measured |= NsPerOp
+               }
+       case "MB/s":
+               if f, err := strconv.ParseFloat(quant, 64); err == nil {
+                       b.MBPerS = f
+                       b.Measured |= MBPerS
+               }
+       case "B/op":
+               if i, err := strconv.ParseUint(quant, 10, 64); err == nil {
+                       b.AllocedBytesPerOp = i
+                       b.Measured |= AllocedBytesPerOp
+               }
+       case "allocs/op":
+               if i, err := strconv.ParseUint(quant, 10, 64); err == nil {
+                       b.AllocsPerOp = i
+                       b.Measured |= AllocsPerOp
+               }
+       }
+}
+
+func (b *Benchmark) String() string {
+       buf := new(bytes.Buffer)
+       fmt.Fprintf(buf, "%s %d", b.Name, b.N)
+       if (b.Measured & NsPerOp) != 0 {
+               fmt.Fprintf(buf, " %.2f ns/op", b.NsPerOp)
+       }
+       if (b.Measured & MBPerS) != 0 {
+               fmt.Fprintf(buf, " %.2f MB/s", b.MBPerS)
+       }
+       if (b.Measured & AllocedBytesPerOp) != 0 {
+               fmt.Fprintf(buf, " %d B/op", b.AllocedBytesPerOp)
+       }
+       if (b.Measured & AllocsPerOp) != 0 {
+               fmt.Fprintf(buf, " %d allocs/op", b.AllocsPerOp)
+       }
+       return buf.String()
+}
+
+// Set is a collection of benchmarks from one
+// testing.B run, keyed by name to facilitate comparison.
+type Set map[string][]*Benchmark
+
+// ParseSet extracts a Set from testing.B output.
+// ParseSet preserves the order of benchmarks that have identical
+// names.
+func ParseSet(r io.Reader) (Set, error) {
+       bb := make(Set)
+       scan := bufio.NewScanner(r)
+       ord := 0
+       for scan.Scan() {
+               if b, err := ParseLine(scan.Text()); err == nil {
+                       b.Ord = ord
+                       ord++
+                       bb[b.Name] = append(bb[b.Name], b)
+               }
+       }
+
+       if err := scan.Err(); err != nil {
+               return nil, err
+       }
+
+       return bb, nil
+}