gbn 0.4.3

Greenlet BottleNeck profiler.

Greenlet BottleNeck profiler.

Measures time precisely using “greenlet.settrace” to pause/continue counting time on switch from/to original greenlet.

May count wall-clock time too. Also counts step calls and context switches.

Usage:

gbn_attach()

gbn('step1')
step1()

gbn('step2')
step2()

wall = gbn('step3')
step3()

wall = gbn('step4', wall=wall)
step4()

gbn('step5', wall=wall)
step5()

gbn()
does_not_count_this()

log.info(gbn_report_and_reset())
# OR
spawn(gbn_report_and_reset, each=60, log=log.info)

See help(gbn) for detailed docs.

Additional tools:

• gxray - Heavy profiler when you don’t know where to profile.

• gswitched - Checks if greenlet switched.