The tests below are failing on the Big Sur Apple Silicon debug JSC bot due to hitting a hard timeout: ** The following JSC stress test failures have been introduced: microbenchmarks/let-const-tdz-environment-parsing-and-hash-consing-speed.js.dfg-eager-no-cjit-validate microbenchmarks/let-const-tdz-environment-parsing-and-hash-consing-speed.js.ftl-eager-no-cjit microbenchmarks/let-const-tdz-environment-parsing-and-hash-consing-speed.js.ftl-eager-no-cjit-b3o1 microbenchmarks/let-const-tdz-environment-parsing-and-hash-consing-speed.js.no-llint https://build.webkit.org/#/builders/100/builds/78/steps/jscore-test/logs/stdio
Looks like these have been failing since these queues were brought up.
<rdar://problem/75769473>
The error is: HARD TIMEOUT after 300.000000 sec
Based on https://results.webkit.org/?suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&test=microbenchmarks%2Flet-const-tdz-environment-parsing-and-hash-consing-speed.js.dfg-eager-no-cjit-validate&test=microbenchmarks%2Flet-const-tdz-environment-parsing-and-hash-consing-speed.js.ftl-eager-no-cjit&test=microbenchmarks%2Flet-const-tdz-environment-parsing-and-hash-consing-speed.js.ftl-eager-no-cjit-b3o1&test=microbenchmarks%2Flet-const-tdz-environment-parsing-and-hash-consing-speed.js.no-llint&model=Macmini9%2C1, this is no longer occurring.