On Fri, Nov 10, 2017 at 4:22 PM, Xidorn Quan <m...@upsuper.org> wrote:
> I'm happy hearing this. I would be interested on whether we are going to > drop Python 2 at some point, or are we stuck with that forever? > Let's put it this way: we still have a few uses of Perl in the build system. There have been no meaningful changes to that Perl code in years. We'll likely be using Python 2 for years ahead because there isn't a compelling reason to port code that isn't being actively updated. > > Also I'm curious what modern features are the team looking forward to? > asyncio is huge for performance, especially for I/O bound workloads (both local and network). We have a few of these in critical paths in the build system. Python 3.6 is faster than 2.7 pretty much across the board in everything except for process startup overhead. Python 3 has sensible behavior with regards to not coercing Unicode and bytes types, which means people not using English in their operation system won't experience as many build failures due to us failing to handle Unicode in the build system. Type annotations make it easier to hack on large code bases and make IDEs more useful. If you do perf hacking in Python, Python 3 also has a slew of new facilities for memory and CPU profiling. There's also a ton of random package additions and improvements in the standard library. And of course tons of small bug fixes. > > On Sat, Nov 11, 2017, at 10:27 AM, Gregory Szorc wrote: > > For reasons outlined at > > https://bugzilla.mozilla.org/show_bug.cgi?id=1388447#c7, we would like > to > > make Python 3 a requirement to build Firefox sometime in the Firefox 59 > > development cycle. (Firefox 59 will be an ESR release.) > > > > The requirement will likely be Python 3.5+. Although I would love to make > > that 3.6 if possible so we can fully harness modern features and > > performance. > > > > I would love to hear feedback - positive or negative - from downstream > > packagers and users of various operating systems and distributions about > > this proposal. > > > > Please send comments to dev-bui...@lists.mozilla.org or leave them on > bug > > 1388447. > _______________________________________________ > dev-platform mailing list > dev-platform@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-platform > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
