[Python-Dev] Mercurial sluggishness (was: this is what happens if you freeze all the modules required for startup)

[Chris Angelico]

On Wed, Apr 16, 2014 at 1:56 AM, Skip Montanaro <skip at pobox.com> wrote:
> On Tue, Apr 15, 2014 at 10:42 AM, Daniel Holth <dholth at gmail.com> wrote:
>> I wish it was less
>> than 50 milliseconds (0.05 seconds) including running hg, which is the
>> common threshold for "instant".
>
> "Instant" for me is "the blink of an eye," which Wikipedia reports as
> typically between 100ms and 400ms.
> <http://en.wikipedia.org/wiki/Blink> If you blink, you've missed
> Python 2.7 startup on a relatively modern machine.
>

400ms feels glitchy. 100ms is the absolute maximum for immediate
interaction. If I can sense a musical beat between doing something and
seeing its result, it's not instant.

And if there's a comedic beat between them, it's... laughably slow.

*dives for cover*

ChrisA