Run results for: Hashing-2

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 13_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 13

Operating system: iOS 13.6.1

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
positive hashcode 1	218606.2 Ops/sec
positive hashcode 2	214938.2 Ops/sec
32 bit hashcode	217179.0 Ops/sec
many bit hashcode	213701.3 Ops/sec
positive hashcode 1.1	213779.0 Ops/sec
positive hashcode 2.1	212221.9 Ops/sec
positive hashcode 2.2	1032956.0 Ops/sec
positive hashcode 1.2	1114201.0 Ops/sec
positive hashcode 1.3	3084975.0 Ops/sec

Script Preparation code:

var s = 'asdlkjhasdjkhasdkjh12381~//~2397yhkasdhjkaals;d~//~lasdk;asdk;lk~//~sd';

Tests:

positive hashcode 1
function hashCode(s) { for (var h = 0, i = 0; i < s.length; ++i) { h = Math.imul(31, h) + s.charCodeAt(i); } return h >>> 0; } hashCode(s);
positive hashcode 2
function hashCode(s) { for (var h = 0, i = 0; i < s.length; ++i) { h = Math.imul(31, h) + s.charCodeAt(i); } return Math.abs(h); } hashCode(s);
32 bit hashcode
function hashCode(s) { for (var h = 0, i = 0; i < s.length; ++i) { h = Math.imul(31, h) + s.charCodeAt(i) | 0; } return h; } hashCode(s);
many bit hashcode
function hashCode(s) { for (var h = 0, i = 0; i < s.length; ++i) { h = Math.imul(31, h) + s.charCodeAt(i); } return h; } hashCode(s);
positive hashcode 1.1
function hashCode(s) { for (var h = 0, i = 0; i < s.length; ++i) { h = Math.imul(31, h) + s.charCodeAt(i) | 0; } return h >>> 0; } hashCode(s);
positive hashcode 2.1
function hashCode(s) { for (var h = 0, i = 0; i < s.length; ++i) { h = Math.imul(31, h) + s.charCodeAt(i) | 0; } return Math.abs(h); } hashCode(s);
positive hashcode 2.2
function hashCode(s) { for (var h = 0, i = 0; i < s.length; ++i) { h = 31 * h + s.charCodeAt(i) | 0; } return Math.abs(h); } hashCode(s);
positive hashcode 1.2
function hashCode(s) { for (var h = 0, i = 0; i < s.length; ++i) { h = 31 * h + s.charCodeAt(i) | 0; } return h >>> 0; } hashCode(s);
positive hashcode 1.3
function hashCode(s) { for (var h = 0, i = 0; i < s.length; ++i) { h = 31 * h + s.charCodeAt(i); } return h >>> 0; } hashCode(s);

positive hashcode 1

positive hashcode 2

32 bit hashcode

many bit hashcode

positive hashcode 1.1

positive hashcode 2.1

positive hashcode 2.2

positive hashcode 1.2

positive hashcode 1.3