TypeScript benchmark is one of the Octane benchmarks that does not do warm up, so Crankshaft does not have chance to fully shine [which is totally fair given ho

TypeScript benchmark is one of the Octane benchmarks that does not do warm up, so Crankshaft does not have chance to fully shine [which is totally fair given how TypeScript compiler is used: you don't warm it up, you just spawn it again and again]. It also has an extremely flat profile. So you can't simply say that "Crankshaft is not effective for it". Though potentially you can say "benefits of Crankshafting do not compensate for the cost of Crankshafting". If you enable warmup for it then score jumps by a factor of 2 for V8. JSC might be warming faster or simply have a better cost / benefit ratio at lower tiers. I doubt FTL kicks at all for this benchmark given how short running it is. V8 also deopts quite a bit on it, so it might be some pathological case... This is definitely something worth exploring and fixing on V8 side.