The following IndexDB tests are timing out on the GTK performance bot: https://build.webkit.org/#/builders/26/builds/10121 Running IndexedDB/basic/index-cursor-delete-2.html (129 of 260) Couldn't quit 1847325 with SIGTERM, sending SIGKILL. FAILED Finished: 605.342587 s -- Running IndexedDB/basic/index-multientry.html (130 of 260) Couldn't quit 1847438 with SIGTERM, sending SIGKILL. FAILED Finished: 605.353958 s -- Running IndexedDB/basic/objectstore-add.html (131 of 260) Couldn't quit 1847557 with SIGTERM, sending SIGKILL. FAILED Finished: 605.355811 s -- Running IndexedDB/basic/objectstore-clear.html (132 of 260) Couldn't quit 1847706 with SIGTERM, sending SIGKILL. FAILED Finished: 605.339046 s -- Running IndexedDB/basic/objectstore-cursor-delete.html (136 of 260) Couldn't quit 1848742 with SIGTERM, sending SIGKILL. FAILED Finished: 605.355550 s -- Running IndexedDB/basic/objectstore-cursor-update.html (137 of 260) Couldn't quit 1848858 with SIGTERM, sending SIGKILL. FAILED Finished: 605.356635 s -- Running IndexedDB/basic/objectstore-delete.html (138 of 260) Couldn't quit 1848982 with SIGTERM, sending SIGKILL. FAILED Finished: 605.354095 s -- Running IndexedDB/basic/objectstore-put.html (139 of 260) Couldn't quit 1849105 with SIGTERM, sending SIGKILL. FAILED Finished: 605.353579 s -- Running IndexedDB/stress/large-array-keys.html (140 of 260) Couldn't quit 1849230 with SIGTERM, sending SIGKILL. FAILED Finished: 605.349098 s -- Running IndexedDB/stress/large-number-of-inserts-responsiveness.html (141 of 260) Couldn't quit 1849364 with SIGTERM, sending SIGKILL. FAILED Finished: 605.354803 s -- Running IndexedDB/stress/large-string-keys.html (142 of 260) Couldn't quit 1849487 with SIGTERM, sending SIGKILL. FAILED Finished: 605.348670 s However, this very same tests take few to run on the Apple port https://build.webkit.org/#/builders/1684/builds/164 Running IndexedDB/basic/index-cursor-delete-2.html (129 of 268) RESULT IndexedDB: basic: index-cursor-delete-2: Time= 457.13749999999993 ms median= 455.0 ms, stdev= 6.1123319008 ms, min= 448.0 ms, max= 475.0 ms RESULT IndexedDB: basic: index-cursor-delete-2: JSHeap= 1641664.2125 bytes median= 1607313.0 bytes, stdev= 617698.0771219622 bytes, min= 547485.0 bytes, max= 2933026.0 bytes RESULT IndexedDB: basic: index-cursor-delete-2: Malloc= 190104371.2 bytes median= 190070784.0 bytes, stdev= 13401371.375679657 bytes, min= 157237248.0 bytes, max= 205684736.0 bytes Finished: 76.055670 s -- Running IndexedDB/basic/index-multientry.html (133 of 268) RESULT IndexedDB: basic: index-multientry: Time= 456.2625 ms median= 459.00000000000045 ms, stdev= 28.8205902794 ms, min= 399.9999999999991 ms, max= 501.0 ms RESULT IndexedDB: basic: index-multientry: JSHeap= 2268019.45 bytes median= 850400.0 bytes, stdev= 11705791.727024058 bytes, min= 771151.0 bytes, max= 105208701.0 bytes RESULT IndexedDB: basic: index-multientry: Malloc= 1187425280.0 bytes median= 1267548160.0 bytes, stdev= 202089446.728177 bytes, min= 585203712.0 bytes, max= 1278001152.0 bytes Finished: 41.592017 s Running IndexedDB/basic/objectstore-add.html (134 of 268) RESULT IndexedDB: basic: objectstore-add: Time= 84.2875 ms median= 84.00000000000003 ms, stdev= 1.160464224 ms, min= 81.0 ms, max= 87.0 ms RESULT IndexedDB: basic: objectstore-add: JSHeap= 2232045.775 bytes median= 2411818.5 bytes, stdev= 844626.1110300798 bytes, min= 0.0 bytes, max= 3463731.0 bytes RESULT IndexedDB: basic: objectstore-add: Malloc= 161103257.6 bytes median= 160964608.0 bytes, stdev= 13002202.462619752 bytes, min= 136151040.0 bytes, max= 181534720.0 bytes Finished: 10.120747 s Running IndexedDB/basic/objectstore-clear.html (135 of 268) RESULT IndexedDB: basic: objectstore-clear: Time= 1.5249999999999844 ms median= 2.0 ms, stdev= 0.5025252686 ms, min= 0.9999999999997726 ms, max= 2.0 ms RESULT IndexedDB: basic: objectstore-clear: JSHeap= 788612.375 bytes median= 837822.0 bytes, stdev= 318781.8379573683 bytes, min= 0.0 bytes, max= 1186440.0 bytes RESULT IndexedDB: basic: objectstore-clear: Malloc= 139437670.4 bytes median= 138854400.0 bytes, stdev= 5076229.791382436 bytes, min= 127467520.0 bytes, max= 149864448.0 bytes Finished: 9.737471 s -- Running IndexedDB/basic/objectstore-cursor-delete.html (139 of 268) RESULT IndexedDB: basic: objectstore-cursor-delete: Time= 439.0625 ms median= 439.0 ms, stdev= 2.2577223316 ms, min= 433.0 ms, max= 444.0 ms RESULT IndexedDB: basic: objectstore-cursor-delete: JSHeap= 831168.225 bytes median= 831468.0 bytes, stdev= 209565.6096876859 bytes, min= 499005.0 bytes, max= 1333266.0 bytes RESULT IndexedDB: basic: objectstore-cursor-delete: Malloc= 146798796.8 bytes median= 148291584.0 bytes, stdev= 6036386.802208567 bytes, min= 132677632.0 bytes, max= 155746304.0 bytes Finished: 46.567488 s Running IndexedDB/basic/objectstore-cursor-update.html (140 of 268) RESULT IndexedDB: basic: objectstore-cursor-update: Time= 440.225 ms median= 440.0 ms, stdev= 1.1470931892 ms, min= 437.9999999999991 ms, max= 445.0 ms RESULT IndexedDB: basic: objectstore-cursor-update: JSHeap= 517634.775 bytes median= 517908.0 bytes, stdev= 3944.6019579879 bytes, min= 507402.0 bytes, max= 523419.0 bytes RESULT IndexedDB: basic: objectstore-cursor-update: Malloc= 136866816.0 bytes median= 137035776.0 bytes, stdev= 2098652.779456216 bytes, min= 132759552.0 bytes, max= 140296192.0 bytes Finished: 40.179112 s -- Running IndexedDB/basic/objectstore-delete.html (142 of 268) RESULT IndexedDB: basic: objectstore-delete: Time= 81.5 ms median= 81.0 ms, stdev= 1.4408155215 ms, min= 79.00000000000045 ms, max= 89.0 ms RESULT IndexedDB: basic: objectstore-delete: JSHeap= 1668469.425 bytes median= 1638173.0 bytes, stdev= 652048.214917818 bytes, min= 672153.0 bytes, max= 2964049.0 bytes RESULT IndexedDB: basic: objectstore-delete: Malloc= 161071308.8 bytes median= 163479552.0 bytes, stdev= 12929680.490922738 bytes, min= 138854400.0 bytes, max= 185303040.0 bytes Finished: 16.457168 s -- Running IndexedDB/basic/objectstore-put.html (144 of 268) RESULT IndexedDB: basic: objectstore-put: Time= 89.55 ms median= 89.5 ms, stdev= 1.0779727809 ms, min= 88.0 ms, max= 93.0 ms RESULT IndexedDB: basic: objectstore-put: JSHeap= 2239941.2125 bytes median= 2397958.0 bytes, stdev= 905224.393397245 bytes, min= 0.0 bytes, max= 3633617.0 bytes RESULT IndexedDB: basic: objectstore-put: Malloc= 158713446.4 bytes median= 156450816.0 bytes, stdev= 12096047.203873219 bytes, min= 137543680.0 bytes, max= 178831360.0 bytes Finished: 10.725116 s Running IndexedDB/stress/large-array-keys.html (145 of 268) RESULT IndexedDB: stress: large-array-keys: Time= 491.6875 ms median= 493.0 ms, stdev= 4.3620740335 ms, min= 485.0 ms, max= 503.0 ms RESULT IndexedDB: stress: large-array-keys: JSHeap= 515522.2375 bytes median= 606447.0 bytes, stdev= 217929.0183093385 bytes, min= 0.0 bytes, max= 606678.0 bytes RESULT IndexedDB: stress: large-array-keys: Malloc= 176965632.0 bytes median= 170999808.0 bytes, stdev= 30612014.811945017 bytes, min= 134692864.0 bytes, max= 233127936.0 bytes Finished: 45.199458 s -- Running IndexedDB/stress/large-number-of-inserts-responsiveness.html (147 of 268) RESULT IndexedDB: stress: large-number-of-inserts-responsiveness: Time= 30.10000000000003 ms median= 30.0 ms, stdev= 1.2487968894 ms, min= 28.99999999999818 ms, max= 40.0 ms RESULT IndexedDB: stress: large-number-of-inserts-responsiveness: JSHeap= 8792688.1 bytes median= 8915123.0 bytes, stdev= 2487572.98128052 bytes, min= 4633033.0 bytes, max= 13417008.0 bytes RESULT IndexedDB: stress: large-number-of-inserts-responsiveness: Malloc= 387086950.4 bytes median= 398737408.0 bytes, stdev= 46162095.72700442 bytes, min= 249282560.0 bytes, max= 447299584.0 bytes Finished: 90.755821 s -- Running IndexedDB/stress/large-string-keys.html (149 of 268) RESULT IndexedDB: stress: large-string-keys: Time= 957.75 ms median= 958.0 ms, stdev= 2.125790992 ms, min= 952.0 ms, max= 962.0 ms RESULT IndexedDB: stress: large-string-keys: JSHeap= 29710341.75 bytes median= 29710287.5 bytes, stdev= 96.6328691132 bytes, min= 29710284.0 bytes, max= 29710508.0 bytes RESULT IndexedDB: stress: large-string-keys: Malloc= 432067993.6 bytes median= 432160768.0 bytes, stdev= 151013472.23467058 bytes, min= 184549376.0 bytes, max= 679526400.0 bytes Finished: 83.994810 s This can be related with the same issue of bug 167616 reported years ago