125518 2013-12-10 08:34:06 -0800 Nursery collections require waiting for concurrent compilations to finish 2014-04-29 15:28:53 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Unspecified RESOLVED DUPLICATE 128291 P2 Normal --- 121074 1 mhahnenberg mhahnenberg fpizlo ggaren oldest_to_newest 958378 0 mhahnenberg 2013-12-10 08:34:06 -0800 This could in some cases significantly increase the pause times for nursery collections. I haven't confirmed this with any evidence, but I just realized it might be an issue. First step is to investigate. If it proves to be a problem we might be able to rework some things to make it so nursery collections don't need to wait for the compiler to finish what it's doing. 977194 1 mhahnenberg 2014-02-05 19:10:09 -0800 Marking as a duplicate of the other bug since there's more concrete data there. *** This bug has been marked as a duplicate of bug 128291 *** 977230 2 fpizlo 2014-02-05 21:24:01 -0800 Is this meant to cover both DFG and FTL compilations? If so, why is it duped to https://bugs.webkit.org/show_bug.cgi?id=128291, which is meant to only cover LLVM-based compilations? I believe that making all compilations concurrent is a significantly harder problem, than reducing the pauses due to LLVM compilations. 977240 3 fpizlo 2014-02-05 22:21:12 -0800 I don't think this is the same bug. 982933 4 mhahnenberg 2014-02-20 12:21:48 -0800 I'm gonna re-dup this back to that bug. I think your ultimate solution turned out to solve this issue with both the DFG and FTL. *** This bug has been marked as a duplicate of bug 128291 ***