Run results for: Jump vs switch case

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

switch case

2K/s

jump table

510/s

View exact numbers

Test name	Executions per second
✓ switch case	1,972 Ops/sec
jump table	510 Ops/sec

Tests:

switch case
function thing(j) { switch(j) { case 0: return "rah"; case 1: return "lah"; case 2: return "sah"; case 3: return "blah"; } } for(let i = 0; i < 100000; i++) { for(let j = 0; thing(j) != "blah"; j++) { } }
jump table
function rah() { return "rah"; } function lah() { return "lah"; } function sah() { return "sah"; } function blah() { return "blah"; } let jumpTable = [rah, lah, sah, blah]; for(let i = 0; i < 100000; i++) { for(let j = 0; jumpTable[j]() != "blah"; j++) { } }