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Add function to test for mem leaks in the scanner

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Kovid Goyal 2012-09-09 21:10:30 +05:30
parent 8f095aa63b
commit ae34d417f6
1 changed files with 22 additions and 0 deletions
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22
src/calibre/devices/scanner.py
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@ -329,8 +329,30 @@ class DeviceScanner(object):
return device.is_usb_connected(self.devices, debug=debug,
only_presence=only_presence)
def test_for_mem_leak():
from calibre.utils.mem import memory, gc_histogram, diff_hists
import gc
gc.disable()
scanner = DeviceScanner()
scanner.scan()
for i in xrange(3): gc.collect()
for reps in (10, 100, 1000, 10000):
for i in xrange(3): gc.collect()
h1 = gc_histogram()
startmem = memory()
for i in xrange(reps):
scanner.scan()
for i in xrange(3): gc.collect()
usedmem = memory(startmem)
prints('Memory used in %d repetitions of scan(): %.6f KB'%(reps,
1024*usedmem))
prints('Differences in python object counts:')
diff_hists(h1, gc_histogram())
def main(args=sys.argv):
test_for_mem_leak()
return 0
if __name__ == '__main__':