Status: Accepted
Owner: [email protected]
CC: [email protected],  [email protected]
Labels: Type-Bug Priority-Medium

New issue 3681 by [email protected]: mjsunit/json2 in 64 bits debug mode slowed down from 6s to 4m25s
https://code.google.com/p/v8/issues/detail?id=3681

Local bisect points to this CL:

https://chromium.googlesource.com/v8/v8/+/3ea82aa917218f56188c873cf8b5612f9e889e3d

Compile with GYPFLAGS += -Dv8_optimized_debug=1

Run:
time out/x64.optdebug/d8 --test --random-seed=-929240209 --nohard-abort --nodead-code-elimination --nofold-constants --enable-slow-asserts --debug-code --verify-heap --allow-natives-syntax --expose-externalize-string test/mjsunit/mjsunit.js test/mjsunit/json2.js

Only happens if --enable-slow-asserts is set.

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