Benchmark: if-else vs switch and variations

Tests:

if-else-if-else
let errorKey = 'error_occured' const err = { status: 503 } if (err.status == 401) { errorKey = 'error_rrn_not_authorized' } else if (err.status == 400 || err.status == 404) { errorKey = 'error_rrn_no_match' } else if (err.status == 502 || err.status == 503) { errorKey = 'error_rrn_not_available' }
switch-with-default-initialized
let errorKey = 'error_occured' const err = { status: 503 } switch (err.status) { case 401: errorKey = 'error_rrn_not_authorized' break case 400: case 404: errorKey = 'error_rrn_no_match' break case 502: case 503: errorKey = 'error_rrn_not_available' break }
switch-without-default
let errorKey const err = { status: 503 } switch (err.status) { case 401: errorKey = 'error_rrn_not_authorized' break case 400: case 404: errorKey = 'error_rrn_no_match' break case 502: case 503: errorKey = 'error_rrn_not_available' break default: errorKey = 'error_occured' }

Rendered benchmark preparation results:

Previous results

Test case name	Result
if-else-if-else
switch-with-default-initialized
switch-without-default

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0

Browser/OS: Chrome 131 on Windows

switch-with-default-initialized

69.6M/s

switch-without-default

69.3M/s

if-else-if-else

67.1M/s

View exact numbers

Test name	Executions per second
✓ switch-with-default-initialized	69,576,760 Ops/sec
switch-without-default	69,345,888 Ops/sec
if-else-if-else	67,078,672 Ops/sec

if-else vs switch and variations (version: 1)