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by Jasper_ 4138 days ago
Shumway doesn't decompile ABC bytecode to ActionScript, it compiles it to JavaScript, which is then evaluated. It has a from-scratch JIT engine that analyzes the bytecode and generates JS.

https://github.com/mozilla/shumway/blob/master/src/avm2/comp...

I've worked a lot with Flash bytecode and contributed to Shumway a long time ago, so if you have any more questions, let me know!