152738 2016-01-05 11:04:35 -0800 Changing prototypes should cache the new structure. 2016-01-20 12:07:54 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified NEW P2 Normal --- 1 keith_miller keith_miller sam oldest_to_newest 1152764 0 keith_miller 2016-01-05 11:04:35 -0800 Currently, when a programmer changes the prototype of their object we allocate a new structure every time even if they use the same prototype every time. Not only does this use linear additional memory if they do it to every object they allocate but it also perniciously causes all the code these objects touch to become megamorphic. 1157006 1 keith_miller 2016-01-20 12:07:54 -0800 Whoever looks at this should consider fixing caching the structure for bound functions when the prototype is null.