On 9 Jul 2015, at 08:00, Xinliang David Li <xinlian...@gmail.com> wrote: > > You need to be more specific on why the regression is problematic (and more > so than missed opportunities). Text size increase (shared and much smaller > than heap) is usually not a big issue except for tiny devices which is likely > to use Os/Oz in the build. For servers, there are are simple rules to compare > cpu vs ram resource cost.
Text size increase also means more TLB and i-cache misses. We’ve observed that single-program benchmarks show this quite poorly, but the aggregate increase in i-cache and TLB pressure across the entire system can degrade performance overall on a typical desktop workload (not so relevant for single-application servers, but very relevant for server VMs). I believe some folks at Apple did a more systematic analysis of this, but I don’t know if their detailed results are public. David _______________________________________________ cfe-commits mailing list cfe-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
