Performance vs. built-in time.strptime

[derekenos]

Outputs

This Library

python3.9 -c "from __init__ import strptime; print(strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ'))"

Outputs

struct_time(tm_year=2020, tm_mon=12, tm_mday=28, tm_hour=12, tm_min=0, tm_sec=0, tm_wday=0, tm_yday=363)

Built-in

python3.9 -c "from time import strptime; print(strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ'))"

Outputs

time.struct_time(tm_year=2020, tm_mon=12, tm_mday=28, tm_hour=12, tm_min=0, tm_sec=0, tm_wday=0, tm_yday=363, tm_isdst=-1)

1000 executions

Python 2.7

This Library

$ time for i in {0..1000}; do python -c "from __init__ import strptime; strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ')"; done

real	0m10.061s
user	0m7.183s
sys	0m2.957s

Built-in

$ time for i in {0..1000}; do python -c "from time import strptime; strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ')"; done

real	0m11.979s
user	0m9.452s
sys	0m2.610s

Python 3.9

This Library

$ time for i in {0..1000}; do python3.9 -c "from __init__ import strptime; strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ')"; done

real	0m15.709s
user	0m12.771s
sys	0m3.033s

Built-in

$ time for i in {0..1000}; do python3.9 -c "from time import strptime; strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ')"; done

real	0m24.300s
user	0m20.659s
sys	0m3.734s

10,000 executions

Python 2.7

This Library

$ time for i in {0..10000}; do python -c "from time import strptime; strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ')"; done

real	1m58.888s
user	1m29.695s
sys	0m30.012s

Built-in

$ time for i in {0..10000}; do python -c "from __init__ import strptime; strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ')"; done

real	1m44.281s
user	1m15.622s
sys	0m29.298s

Python 3.9

This Library

$ time for i in {0..10000}; do python3.9 -c "from __init__ import strptime; strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ')"; done

real	2m36.523s
user	2m7.484s
sys	0m30.014s

Built-in

$ time for i in {0..10000}; do python3.9 -c "from time import strptime; strptime('2020-12-28T12:00:00Z', '%Y-%m-%dT%H:%M:%SZ')"; done

real	4m0.683s
user	3m25.811s
sys	0m35.859s