Hi Bob - quick comment in this. The comparable to DartVM is not WebAssembly but PNaCl, which was Chrome-only. Wasm was much easier because asm.js proved the con

Hi Bob - quick comment in this. The comparable to DartVM is not WebAssembly but PNaCl, which was Chrome-only. Wasm was much easier because asm.js proved the concept source-compatibly and in multiple browsers. I spoke to Anders Hejlsberg, Steve Lucco, and others at MS in fall 2013 and they got on board, even using OdinMonkey code licensed under ASL2 by Mozilla to overcome MS objections to the MPL. Meanwhile Dartium could not land in WebKit pre-Blink, because two GCs impose a cycle collector “super-GC” with inevitable extra cost. See https://lists.webkit.org/pipermail/webkit-dev/2011-December/018811.html https://lists.webkit.org/pipermail/webkit-dev/2011-December/... (I found this link from my HN post at https://news.ycombinator.com/item?id=12773857 https://news.ycombinator.com/item?id=12773857). DartVM like PNaCl was trying for too much in Chrome, exceeding what other browsers could afford to embrace at high direct and opportunity costs in a competitive post-Chrome browser market. A spec would take many years and multiple competing implementations to forge. Code is spec with such big single-company-grown projects.