Avoid 1s delay on consequent lock in windows #66
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use winapi LockFile instead of msvcrt.locking in order to avoid 1s delay when file is locked
in windows when the file is locked (using msvcrt.locking) another attempt to lock it will take 1s (just to see its already locked). using winapi FileLock instead doesn't have this buggy implemetation.
for more details see this issue