in reply to Slow speeds with MozRepl

This does, indeed, sound strange.

Various synchronization programs are known to cause significant input/output load, which may slow down other programs if they try to do I/O on the same physical device. Can you measure how much I/O does Synology Drive cause on your system while syncing? Which operating system you are on?

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Re^2: Slow speeds with MozRepl
by emav (Pilgrim) on Jul 15, 2018 at 09:39 UTC
    I'm on Win10. Indeed, I/O activity on the hd where Synology Drive is performing sync tasks can reach top levels (even spikes of 100%) but the c: drive where perl, firefox, and my scripts reside has been left out of Synology Drive's reach (I have another program that backs it up when my computer is idle). I guess it might bottleneck at the controller level but would that be so persistent as to cause problems even when the synchronization tasks are paused? There seems to be no I/O activity of this sort at the time. Yet, here we are.
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      Unless someone has a better idea, it may make sense to capture execution profiles of runs both with and without Synology Drive active, both Perl and C sides of things. The latter might demonstrate whether Synology Drive is doing something unusual, like injecting its DLL into other processes.
[reply]

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