author Julian Seward <jseward@acm.org>
Tue, 31 Jan 2023 06:11:20 +0000
changeset 651017 3cb50cbf836e2e371e41a7b3c9ddd60a6010e109
parent 93716 d37d4edce6dd592f04afa606deb1ae327c07b4a4
permissions -rw-r--r--
Bug 1812285 - wasm::InitExprInterpreter: use inline capacity for `::stack`. r=yury. The Dart Barista-3 benchmark gives the initial expression interpreter a lot of work. Profiling shows that wasm::InitExprInterpreter::stack heap-allocates around 37000 short-lifetime blocks to hold the stacked values. Using a 48-element inline capacity removes all of those allocations. (40 removes almost all, but not all). Similar ridealong fix: for the wasm parser iterator Iter<Policy>::valueStack_, increase inline capacity from 16 to 32. This takes out another 2500 allocations. Differential Revision: https://phabricator.services.mozilla.com/D167926

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