Switch vs. If + else
JavaScript performance comparison
Revision 3 of this test case created
Preparation code
<script type="text/javascript">
var n = 100,
c = 'a',
s = 'string test';
</script>
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Testing in unknown unknown
| Test |
Ops/sec |
Switch Number |
switch (n) {
case 10:
break;
case 20:
break;
case 30:
break;
case 40:
break;
case 50:
break;
case 60:
break;
case 70:
break;
case 80:
break;
case 90:
break;
case 100:
break;
};
|
pending… |
If/Else Number |
if (n === 10) {
} else if (n === 20) {
} else if (n === 30) {
} else if (n === 40) {
} else if (n === 50) {
} else if (n === 60) {
} else if (n === 70) {
} else if (n === 80) {
} else if (n === 90) {
} else if (n === 100) {
};
|
pending… |
Switch Char |
switch (c) {
case 'j':
break;
case 'i':
break;
case 'h':
break;
case 'g':
break;
case 'f':
break;
case 'e':
break;
case 'd':
break;
case 'c':
break;
case 'b':
break;
case 'a':
break;
};
|
pending… |
If/Else Char |
if (c === 'j') {
} else if (c === 'i') {
} else if (c === 'h') {
} else if (c === 'g') {
} else if (c === 'f') {
} else if (c === 'e') {
} else if (c === 'd') {
} else if (c === 'c') {
} else if (c === 'b') {
} else if (c === 'a') {
};
|
pending… |
Switch String |
switch (s) {
case 'gntsiretts':
break;
case 'stteristng':
break;
case 'strteingst':
break;
case 'testrsting':
break;
case 'testringst':
break;
case 'strtesting':
break;
case 'teststring':
break;
case 'stringtest':
break;
case 'test string':
break;
case 'string test':
break;
};
|
pending… |
If/Else String |
if (s === 'gntsiretts') {
} else if (s === 'stteristng') {
} else if (s === 'strteingst') {
} else if (s === 'testrsting') {
} else if (s === 'testringst') {
} else if (s === 'strtesting') {
} else if (s === 'teststring') {
} else if (s === 'stringtest') {
} else if (s === 'test string') {
} else if (s === 'string test') {
};
|
pending… |
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