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|
package dateparse
import (
"fmt"
"testing"
"time"
)
/*
go test -bench Parse
BenchmarkShotgunParse 50000 37588 ns/op 13258 B/op 167 allocs/op
BenchmarkDateparseParseAny 500000 5752 ns/op 0 B/op 0 allocs/op
// Aarons Laptop Lenovo 900 Feb 2018
BenchmarkShotgunParse-4 50000 30045 ns/op 13136 B/op 169 allocs/op
BenchmarkParseAny-4 200000 8627 ns/op 144 B/op 3 allocs/op
// ifreddyrondon Laptop MacBook Pro (Retina, Mid 2012) March 2018
BenchmarkShotgunParse-8 50000 33940 ns/op 13136 B/op 169 allocs/op
BenchmarkParseAny-8 200000 10146 ns/op 912 B/op 29 allocs/op
BenchmarkParseDateString-8 10000 123077 ns/op 208 B/op 13 allocs/op
*/
func BenchmarkShotgunParse(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
for _, dateStr := range testDates {
// This is the non dateparse traditional approach
parseShotgunStyle(dateStr)
}
}
}
func BenchmarkParseAny(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
for _, dateStr := range testDates {
ParseAny(dateStr)
}
}
}
/*
func BenchmarkParseDateString(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
for _, dateStr := range testDates {
timeutils.ParseDateString(dateStr)
}
}
}
*/
var (
testDates = []string{
"2012/03/19 10:11:59",
"2012/03/19 10:11:59.3186369",
"2009-08-12T22:15:09-07:00",
"2014-04-26 17:24:37.3186369",
"2012-08-03 18:31:59.257000000",
"2013-04-01 22:43:22",
"2014-04-26 17:24:37.123",
"2014-12-16 06:20:00 UTC",
"1384216367189",
"1332151919",
"2014-05-11 08:20:13,787",
"2014-04-26 05:24:37 PM",
"2014-04-26",
}
ErrDateFormat = fmt.Errorf("Invalid Date Format")
timeFormats = []string{
// ISO 8601ish formats
time.RFC3339Nano,
time.RFC3339,
// Unusual formats, prefer formats with timezones
time.RFC1123Z,
time.RFC1123,
time.RFC822Z,
time.RFC822,
time.UnixDate,
time.RubyDate,
time.ANSIC,
// Hilariously, Go doesn't have a const for it's own time layout.
// See: https://code.google.com/p/go/issues/detail?id=6587
"2006-01-02 15:04:05.999999999 -0700 MST",
// No timezone information
"2006-01-02T15:04:05.999999999",
"2006-01-02T15:04:05",
"2006-01-02 15:04:05.999999999",
"2006-01-02 15:04:05",
}
)
func parseShotgunStyle(raw string) (time.Time, error) {
for _, format := range timeFormats {
t, err := time.Parse(format, raw)
if err == nil {
// Parsed successfully
return t, nil
}
}
return time.Time{}, ErrDateFormat
}
|
