cron
A fast non-allocating cron parser in ragel and golang.
features
- standard five-position cron
- six-position cron with seconds
- seven-position cron with seconds and years
- case-insensitive days of the week
- case-insensitive month names
- Quartz compatible ranges e.g.:
4/10,SUN-THURS/2 - timezone handling (other than UTC)
- Quartz compatible # handling, i.e.
5#3meaning the third friday of the month - Quartz compatible L handling, i.e.
5Lin the day of week field meaning the last friday of a month, or3Lin the day of month field meaning third to last day of the month
performance
On a 3.1 Ghz Core i7 MacBook Pro (Retina, 15-inch, Mid 2017):
BenchmarkParse/0_*_*_*_*_*_*-8 |
20000000 | 63.5 ns/op | 0 B/op |
BenchmarkParse/1-6/2_*_*_*_Feb-Oct/3_*_*-8 |
10000000 | 118 ns/op | 0 B/op |
BenchmarkParse/1-6/2_*_*_*_Feb-Oct/3_*_2020/4-8 |
1000000 | 146 ns/op | 0 B/op |
TODO
- Once we are done adding all of the Quartz cron features, to copy and pass all of Quartz's parsing tests.