On 07/19/2017 05:59 AM, Victor Stinner wrote:
> Mercurial startup time is already 45.8x slower than Git whereas tested
> Mercurial runs on Python 2.7.12. Now try to sell Python 3 to Mercurial
> developers, with a startup time 2x - 3x slower...
When Matt Mackall spoke at the Python Language Summit some years back, I
recall that he specifically complained about Python startup time. He
said Python 3 "didn't solve any problems for [them]"--they'd already
solved their Unicode hygiene problems--and that Python's slow startup
time was already a big problem for them. Python 3 being /even slower/ to
start was absolutely one of the reasons why they didn't want to upgrade.
You might think "what's a few milliseconds matter". But if you run
hundreds of commands in a shell script it adds up. git's speed is one
of the few bright spots in its UX, and hg's comparative slowness here is
a palpable disadvantage.
> So please continue efforts for make Python startup even faster to beat
> all other programming languages, and finally convince Mercurial to
> upgrade ;-)
I believe Mercurial is, finally, slowly porting to Python 3.
https://www.mercurial-scm.org/wiki/Python3
Nevertheless, I can't really be annoyed or upset at them moving slowly
to adopt Python 3, as Matt's objections were entirely legitimate.
Cheers,
//arry/
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