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Benchmark for implementing undo/redo
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| node_modules/ |
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| test |
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| <html> | |
| <head> | |
| <script src='node_modules/immutable/dist/immutable.min.js'></script> | |
| <script src='index.js'></script> | |
| </head> | |
| </html> |
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| var I = Immutable; | |
| var Map = I.Map; | |
| var List = I.List; | |
| var Range = I.Range; | |
| var ATTRS_NUM = 10; | |
| var SHAPES_NUM = 10; | |
| var PAGES_NUM = 20; | |
| var ITERATIONS = 1000; | |
| var READ_COUNT = 500; | |
| function genMap(){ | |
| var o = {}; | |
| for(var i = 0; i < ATTRS_NUM; i++){ | |
| o[i.toString()] = i.toString()+'_value'; | |
| } | |
| return o; | |
| } | |
| function genArray(n, fn){ | |
| var res = []; | |
| for(var i = 0; i < n; i++){ | |
| res.push(fn()); | |
| } | |
| return res; | |
| } | |
| function genPage(){ | |
| var p = genMap(); | |
| p.shapes = genArray(SHAPES_NUM, genMap); | |
| return p; | |
| } | |
| function genPages(){ | |
| return genArray(PAGES_NUM, genPage); | |
| } | |
| function print(data){ | |
| console.log(JSON.stringify(data, undefined, ' ')); | |
| } | |
| var seed = 1; | |
| function random() { | |
| var x = Math.sin(seed++) * 10000; | |
| return x - Math.floor(x); | |
| } | |
| function profile(name, init, serialize, writeOp, readOp){ | |
| seed = 1; | |
| var stack = []; | |
| var data = init(genPages()); | |
| console.time(name); | |
| for(var i = 0; i < ITERATIONS; i++){ | |
| var a = Math.floor((random()*ATTRS_NUM)); | |
| var s = Math.floor((random()*SHAPES_NUM)); | |
| var p = Math.floor((random()*PAGES_NUM)); | |
| stack.push(serialize(data)); | |
| data = writeOp(data, p, s, a); | |
| for(var r = 0; r < READ_COUNT; r++){ | |
| var a = Math.floor((random()*ATTRS_NUM)); | |
| var s = Math.floor((random()*SHAPES_NUM)); | |
| var p = Math.floor((random()*PAGES_NUM)); | |
| readOp(data,a,s,p); | |
| } | |
| } | |
| console.timeEnd(name); | |
| return stack; | |
| } | |
| var immutableResults = profile( | |
| 'immutable', | |
| function(data){return I.fromJS(data)}, | |
| function(data){return data}, | |
| function(data,p,s,a){ | |
| return data.setIn([p, 'shapes', s, a.toString()], 'AAA'); | |
| }, | |
| function(data,p,s,a){ | |
| return data.getIn([p, 'shapes', s, a.toString()]); | |
| } | |
| ); | |
| var mutableResults = profile( | |
| 'mutable', | |
| function(data){return data}, | |
| function(data){return JSON.stringify(data)}, | |
| function(data,p,s,a){ | |
| data[p]['shapes'][s][a.toString()] = 'AAA'; | |
| return data; | |
| }, | |
| function(data,p,s,a){ | |
| return data[p]['shapes'][s][a.toString()]; | |
| } | |
| ); | |
| //ensure results are the same | |
| console.log( | |
| JSON.stringify(mutableResults.map(JSON.parse)) == | |
| JSON.stringify(immutableResults) | |
| ); |
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