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 Positive

13.8M/s

LastIndexOf Negative

13.7M/s

Regex Positive

12.0M/s

Regex Negative

10.9M/s

Split Positive

10.6M/s

Split Negative

10.6M/s

View exact numbers

Test name	Executions per second
✓ LastIndexOf Positive	13,848,487 Ops/sec
LastIndexOf Negative	13,699,181 Ops/sec
Regex Positive	11,952,608 Ops/sec
Regex Negative	10,922,088 Ops/sec
Split Positive	10,588,476 Ops/sec
Split Negative	10,578,672 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');