On Wed, 2014-07-02 at 14:40 +0200, Václav Krpec wrote: > Hmmm, I wouldn't call 0.5 to 1 MB tiny amount... It is when it's not synced to the disk and stays in the kernel's cache. (By the way, you'll want to include "-ttt" in your strace flags, so that time is printed). Let me know when you've had the chance to run sysprof. Cheers