Dave Mandelin a écrit :
>Approximately 35% of our installs are on Windows XP. Microsoft has said that >less than 1% of XP installs are 64-bit. About 7% of our users are on Vista. >Microsoft said Vista's 64-bit percentage is about 11%. Just over 50% of our >Windows users are on Windows 7. Microsoft has said Windows 7 installs are >about 50% 32-bit and 50% 64-bit.
Seems to approximatively match generic deployment numbers : http://en.wikipedia.org/wiki/Usage_share_of_operating_systems
[...] I guess there is still an option of trying to do PGO on 64-bit builds only (which apparently is definitely not possible for VS2010 and earlier) and letting more users pick up those benefits over time. But that's not very compelling.
The start of the discussion is that PGO for 32-bit builds will be really hard to maintain soon. If doing 64-bit PGO builds is costly and impairs the ability to deliver efficient 32-bits non-PGO builds then it's not compelling.
But if that's not the case, at least it's around 33% of users that would keep the PGO advantage, and more newer PC get sold (I just checked that even a $370 Dell Inspiron is today sold with Windows 8 64 bits).
On W3Schools, XP usage is significantly going down : http://www.w3schools.com/browsers/browsers_os.asp _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
