An efficient delta compression algorithm for Node.js, written in C. (see original source code)
Requires NodeJS v4 or higher
const fossilDelta = require('node-delta');
Creating delta between origin and target buffer:
var origin = new Buffer([1,2,3,4]);
var target = new Buffer([1,2,3,4,5,6]);
var delta = fossilDelta.create(origin, target);
Applying the delta:
var origin = new Buffer([1,2,3,4]);
var target = fossilDelta.apply(origin, delta);
For creating the patch, node-delta has the best results. (roughly ~2x speed)
(create) node-delta x 313,371 ops/sec ±1.76% (77 runs sampled)
(create) fossil-delta x 238,424 ops/sec ±3.58% (75 runs sampled)
For applying the patch, fossil-delta-js still have the best results.
(apply) node-delta x 664,472 ops/sec ±5.44% (69 runs sampled)
(apply) fossil-delta x 860,541 ops/sec ±1.57% (84 runs sampled)
MIT