jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.
jsperf.com URLs are mirrored at the same path, e.g:
https://jsperf.com/negative-modulo/2
Can be accessed at:
https://jsperf.app/negative-modulo/2
THREE = function() {};
/**
* @author bhouston / http://exocortex.com/
* Original source from: 2013, April 22: https://github.com/niklasvh/base64-arraybuffer (MIT-LICENSED)
*/
THREE.Base64 = function () {
};
THREE.Base64.base64String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
THREE.Base64.base64DecodeLookup = function() {
var coreArrayBuffer = new ArrayBuffer( 256 );
var base64DecodeLookupTable = new Uint8Array( coreArrayBuffer );
for( var i = 0; i < THREE.Base64.base64String.length; i ++ ) {
base64DecodeLookupTable[ THREE.Base64.base64String[ i ].charCodeAt( 0 ) ] = i;
}
return base64DecodeLookupTable;
}();
THREE.Base64.fromArrayBuffer = function (arraybuffer) {
var bytes = new Uint8Array(arraybuffer),
i, len = bytes.buffer.byteLength, base64 = "";
for (i = 0; i < len; i+=3) {
base64 += THREE.Base64.base64String[bytes[i] >> 2];
base64 += THREE.Base64.base64String[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
base64 += THREE.Base64.base64String[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
base64 += THREE.Base64.base64String[bytes[i + 2] & 63];
}
if ((len % 3) === 2) {
base64 = base64.substring(0, base64.length - 1) + "=";
} else if (len % 3 === 1) {
base64 = base64.substring(0, base64.length - 2) + "==";
}
return base64;
};
THREE.Base64.toArrayBuffer = function() {
var base64DecodeLookup = THREE.Base64.base64DecodeLookup;
return function(base64) {
var bufferLength = base64.length * 0.75,
len = base64.length, i, p = 0,
encoded1, encoded2, encoded3, encoded4;
if (base64[base64.length - 1] === "=") {
bufferLength--;
if (base64[base64.length - 2] === "=") {
bufferLength--;
}
}
var arraybuffer = new ArrayBuffer(bufferLength),
bytes = new Uint8Array(arraybuffer);
for (i = 0; i < len; i+=4) {
encoded1 = base64DecodeLookup[base64.charCodeAt(i)];
encoded2 = base64DecodeLookup[base64.charCodeAt(i+1)];
encoded3 = base64DecodeLookup[base64.charCodeAt(i+2)];
encoded4 = base64DecodeLookup[base64.charCodeAt(i+3)];
bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
}
return arraybuffer;
};
}();
THREE.Base64.toArrayOfFloats = function( base64 ) {
var arrayBuffer = THREE.Base64.toArrayBuffer( base64 );
var floatArray = new Float32Array( arrayBuffer );
var arrayOfFloats = [];
for( var i = 0, il = floatArray.length; i < il; i ++ ) {
arrayOfFloats.push( floatArray[i] );
}
return arrayOfFloats;
};
var array = []
for (var i = 0; i < 10000; i++) {
array.push(i * 0.8734 - 5000);
}
var arrayBuffer = new ArrayBuffer(array.length * 4);
var floatBuffer = new Float32Array(arrayBuffer);
for (var i = 0; i < array.length; i++) {
floatBuffer[i] = array[i];
}
var bufferInBase64 = THREE.Base64.fromArrayBuffer(arrayBuffer);
var bufferInJSON = JSON.stringify(array);
Ready to run.
Test | Ops/sec | |
---|---|---|
JSON to array of floats |
| ready |
Base64 to arraybuffer |
| ready |
Base64 to array of floats |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.