Re: Benefits of PGO on Windows

2012-10-19 Thread Justin Lebar
> If we really wanted to know, either someone would have to spend some time > doing this over and over, or we'd have to use Telemetry with some A/B testing. This would actually be a pretty easy thing to do, to a first approximation anyway. Just turn off PGO on Windows for one nightly build and se

Re: Benefits of PGO on Windows

2012-10-19 Thread Dave Mandelin
On Thursday, October 18, 2012 4:59:10 AM UTC-7, Ted Mielczarek wrote: > If you're interested in the benchmark side of things, it's fairly easy > to compare now that we build both PGO and non-PGO builds on a regular > basis. I'm having a little trouble getting graphserver to give me recent > data

Re: Benefits of PGO on Windows

2012-10-19 Thread Dave Mandelin
On Wednesday, October 17, 2012 11:00:13 PM UTC-7, Mike Hommey wrote: > If you copy omni.ja from the PGO build to the opt build, you'll be able > to see if everything comes from that. We're planning to make that > currently PGO-only optimization run on all builds. (bug 773171) Excellent suggestion,

Re: Benefits of PGO on Windows

2012-10-18 Thread Ted Mielczarek
On 10/17/2012 9:55 PM, Dave Mandelin wrote: Following the recent discussion about PGO, I really wanted to understand what benefits PGO gives Firefox on Windows, if any--I was skeptical. Rafael (IIRC) posted some Talos numbers, but I didn't know how to interpret them. So I decided to try a few s

Re: Benefits of PGO on Windows

2012-10-17 Thread Mike Hommey
On Wed, Oct 17, 2012 at 06:55:57PM -0700, Dave Mandelin wrote: > Following the recent discussion about PGO, I really wanted to understand what > benefits PGO gives Firefox on Windows, if any--I was skeptical. Rafael (IIRC) > posted some Talos numbers, but I didn't know how to interpret them. So I

Re: Benefits of PGO on Windows

2012-10-17 Thread Taras Glek
On 10/17/2012 6:55 PM, Dave Mandelin wrote: Following the recent discussion about PGO, I really wanted to understand what benefits PGO gives Firefox on Windows, if any--I was skeptical. Rafael (IIRC) posted some Talos numbers, but I didn't know how to interpret them. So I decided to try a few s

Benefits of PGO on Windows

2012-10-17 Thread Dave Mandelin
Following the recent discussion about PGO, I really wanted to understand what benefits PGO gives Firefox on Windows, if any--I was skeptical. Rafael (IIRC) posted some Talos numbers, but I didn't know how to interpret them. So I decided to try a few simple experiments to try to falsify the hypot