PyPy now "just works" with @

[Pierre-Yves David]

On 12/05/2015 01:30 PM, Bryan O'Sullivan wrote:
> Very interesting, and thank you for putting in the work to get this going.
>
> What's the effect of startup time on fast-running commands? A majority
> of Mercurial invocations take a fraction of a second even on a huge
> repo, so this is of significant interest.

Basic testing around status and diff show that pypy is still 
significantly slower on basic operation (even pretty bad hit for diff).

My mercurial repository
------------------------
status
python-2.7: 0.040
pypy-4.0.1: 0.260

diff:
python-2.7: 0.460
pypy-4.0.1: 0.980

A Mozilla central clone
------------------------
status:
python-2.7: 0.710
pypy-4.0.1: 1.770

diff:
python-2.7: 1.130
pypy-4.0.1: 8.880

log: (252524 changesets)
python-2.7: 60.710
pypy-4.0.1: 13.200

Some revset:
log --rev 'author(greg) - merge()' (2748 match)
python-2.7: 17.740
pypy-4.0.1: 8.360

 From here we can explore multiple path:

- routing different commands to different implementation,
- getting chg production ready (mostly a life cycle question at that point),
- grabbing the low hanging fruit to have pypy happier,
- Getting the pypy devs to look at the less trivial work,


-- 
Pierre-Yves David