Run results for: URI has No Extension

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

LastIndexOf Negative

14.0M/s

LastIndexOf Positive

13.7M/s

Regex Negative

12.0M/s

Regex Positive

10.9M/s

Split Positive

10.8M/s

Split Negative

10.7M/s

View exact numbers

Test name	Executions per second
✓ LastIndexOf Negative	14,032,678 Ops/sec
LastIndexOf Positive	13,732,300 Ops/sec
Regex Negative	12,027,403 Ops/sec
Regex Positive	10,902,111 Ops/sec
Split Positive	10,776,334 Ops/sec
Split Negative	10,696,055 Ops/sec

Script Preparation code:

function checkExtensionUsingSplit(uri) {
    var lastSegment = uri.split('/').pop();
    return lastSegment && lastSegment.indexOf('.') == -1;
}

function checkExtensionUsingRegex(uri) {
    return !/\.[^./]+$/.test(uri);
}

function checkExtensionUsingLastIndexOf(uri) {
    return uri.indexOf('.', uri.lastIndexOf('/')) == -1;
}

Tests:

Split Negative
checkExtensionUsingSplit('/example/path/filename.pdf');
Split Positive
checkExtensionUsingSplit('/example/path/filename');
Regex Negative
checkExtensionUsingRegex('/example/path/filename.pdf');
Regex Positive
checkExtensionUsingRegex('/example/path/filename');
LastIndexOf Negative
checkExtensionUsingLastIndexOf('/example/path/filename.pdf');
LastIndexOf Positive
checkExtensionUsingLastIndexOf('/example/path/filename');