mirror of
https://github.com/araddon/dateparse.git
synced 2024-11-10 11:51:54 +08:00
96 lines
2.0 KiB
Go
96 lines
2.0 KiB
Go
package dateparse
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import (
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"fmt"
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"testing"
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"time"
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)
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/*
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go test -bench Parse
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BenchmarkShotgunParse 50000 37588 ns/op 13258 B/op 167 allocs/op
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BenchmarkDateparseParseAny 500000 5752 ns/op 0 B/op 0 allocs/op
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// Aarons Laptop Lenovo 900 Feb 2018
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BenchmarkShotgunParse-4 50000 30045 ns/op 13136 B/op 169 allocs/op
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BenchmarkParseAny-4 200000 8627 ns/op 144 B/op 3 allocs/op
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*/
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func BenchmarkShotgunParse(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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for _, dateStr := range testDates {
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// This is the non dateparse traditional approach
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parseShotgunStyle(dateStr)
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}
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}
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}
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func BenchmarkParseAny(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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for _, dateStr := range testDates {
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ParseAny(dateStr)
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}
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}
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}
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var (
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testDates = []string{
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"2012/03/19 10:11:59",
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"2012/03/19 10:11:59.3186369",
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"2009-08-12T22:15:09-07:00",
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"2014-04-26 17:24:37.3186369",
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"2012-08-03 18:31:59.257000000",
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"2013-04-01 22:43:22",
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"2014-04-26 17:24:37.123",
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"2014-12-16 06:20:00 UTC",
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"1384216367189",
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"1332151919",
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"2014-05-11 08:20:13,787",
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"2014-04-26 05:24:37 PM",
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"2014-04-26",
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}
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ErrDateFormat = fmt.Errorf("Invalid Date Format")
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timeFormats = []string{
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// ISO 8601ish formats
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time.RFC3339Nano,
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time.RFC3339,
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// Unusual formats, prefer formats with timezones
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time.RFC1123Z,
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time.RFC1123,
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time.RFC822Z,
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time.RFC822,
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time.UnixDate,
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time.RubyDate,
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time.ANSIC,
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// Hilariously, Go doesn't have a const for it's own time layout.
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// See: https://code.google.com/p/go/issues/detail?id=6587
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"2006-01-02 15:04:05.999999999 -0700 MST",
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// No timezone information
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"2006-01-02T15:04:05.999999999",
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"2006-01-02T15:04:05",
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"2006-01-02 15:04:05.999999999",
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"2006-01-02 15:04:05",
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}
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)
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func parseShotgunStyle(raw string) (time.Time, error) {
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for _, format := range timeFormats {
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t, err := time.Parse(format, raw)
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if err == nil {
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// Parsed successfully
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return t, nil
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}
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}
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return time.Time{}, ErrDateFormat
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}
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