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...e day become true, we've found that whenever we encounter a hot safepoint, the problem is usually that we didn't inline appropriately. As a result, we've ended up fixing (out of tree) inlining or devirtualization bugs rather than working on the lowering itself. For us, a truly hot megamorphic call site has turned out to be a very rare beast. Worth noting is that this is only true because we're a high tier JIT with good profiling information. It's likely that other users who don't have the same design point may find the lowering far more problematic; in fact, we have so...

...y some day become true, we've found that whenever we encounter a hot safepoint, the problem is usually that we didn't inline appropriately. As a result, we've ended up fixing (out of tree) inlining or devirtualization bugs rather than working on the lowering itself. For us, a truly hot megamorphic call site has turned out to be a very rare beast. Worth noting is that this is only true because we're a high tier JIT with good profiling information. It's likely that other users who don't have the same design point may find the lowering far more problematic; in fact, we have some e...

...y some day become true, we've found that whenever we encounter a hot safepoint, the problem is usually that we didn't inline appropriately. As a result, we've ended up fixing (out of tree) inlining or devirtualization bugs rather than working on the lowering itself. For us, a truly hot megamorphic call site has turned out to be a very rare beast. Worth noting is that this is only true because we're a high tier JIT with good profiling information. It's likely that other users who don't have the same design point may find the lowering far more problematic; in fact, we have some e...