On 28 May 2015 at 22:00, Matthias Klose <d...@ubuntu.com> wrote: > On 05/28/2015 02:17 AM, Parasa, Srinivas Vamsi wrote: >> Hi All, >> >> This is Vamsi from Server Scripting Languages Optimization team at Intel >> Corporation. >> >> Would like to submit a request to enable the computed goto based dispatch in >> Python 2.x (which happens to be enabled by default in Python 3 given its >> performance benefits on a wide range of workloads). We talked about this >> patch with Guido and he encouraged us to submit a request on Python-dev >> (email conversation with Guido shown at the bottom of this email). >> >> Attached is the computed goto patch (along with instructions to run) for >> Python 2.7.10 (based on the patch submitted by Jeffrey Yasskin at >> http://bugs.python.org/issue4753). We built and tested this patch for Python >> 2.7.10 on a Linux machine (Ubuntu 14.04 LTS server, Intel Xeon - Haswell EP >> CPU with 18 cores, hyper-threading off, turbo off). >> >> Below is a summary of the performance we saw on the "grand unified python >> benchmarks" suite (available at https://hg.python.org/benchmarks/). We made >> 3 rigorous runs of the following benchmarks. In each rigorous run, a >> benchmark is run 100 times with and without the computed goto patch. Below >> we show the average performance boost for the 3 rigorous runs. >> >> Python 2.7.10 (original) vs Computed Goto performance >> Benchmark > > -1 > > As Gregory pointed out, there are other options to build the interpreter, and > we > are missing data how these compare with your patch.
That's shifting the goal posts: suggesting that we should optimise Python 2 differently from the way we optimised Python 3 isn't a reasonable request to make in the context of a backporting proposal. Regards, Nick. -- Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com