186782 2018-06-18 11:48:57 -0700 Investigate StringImpl memory use 2018-06-18 23:27:57 -0700 1 1 1 Unclassified WebKit Web Template Framework WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 simon.fraser webkit-unassigned ap simon.fraser webkit-bug-importer oldest_to_newest 1434097 0 simon.fraser 2018-06-18 11:48:57 -0700 The data in bug 186422 show that the StringImpl heap uses about 20MB of dirty memory, but only contains about 6MB of data, so there's a potential memory saving here of up to 14MB. VIRTUAL RESIDENT DIRTY SWAPPED ALLOCATION BYTES DIRTY+SWAP REGION MALLOC ZONE SIZE SIZE SIZE SIZE COUNT ALLOCATED FRAG SIZE % FRAG COUNT =========== ======= ========= ========= ========= ========= ========= ========= ====== ====== WebKit StringImpl_0x10b4c0000 100.0M 23.2M 19.9M 0K 74493 6166K 13.9M 70% 27 1434101 1 webkit-bug-importer 2018-06-18 11:49:22 -0700 <rdar://problem/41218701>