Optimize test suite duration by caching test infrastructure#4004
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Optimize test suite duration by caching test infrastructure#4004
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Reduces test_duration from ~454s to ~301s (33% improvement)
Addon loading (especially RuboCop addon) costs ~103ms per test. Generated expectation tests don't need addons, only the hand-written tests that explicitly test addon behavior do. Reduces test_duration from ~301s to ~217s (28% improvement).
Most hand-written tests in these classes don't need addons. Only test_definition_addons and test_hover_addons explicitly enable addon loading. Saves ~3s from avoiding ~79 addon activation cycles.
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Summary
RuboCopFormatterat the class level in formatting and diagnostics expectation tests, avoiding repeated creation ofRuboCopRunnerinstances (2 per test × 2,352 tests)GlobalStateat the class level inExpectationsTestRunner, avoiding redundant initialization per testwith_server(load_addons: true)costs ~38ms vs ~2ms without)In total, this reduces the CI duration by about 10min (~30 -> 20), which is a 33% reduction.
Test plan