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Render flamegraph diff #1

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Render flamegraph diff #1

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7fd4959
try two values
sdmcclain Apr 20, 2017
0ad6b75
add ability to render a flamegraph diff
sdmcclain Apr 21, 2017
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49 changes: 39 additions & 10 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,11 +6,20 @@ var program = require('commander');
function Node(name) {
this.name = name;
this.value = 0;
this.diff = 0;
this.timeshare = 0;
this.children = {};
}

Node.prototype.add = function(frames, value) {
Node.prototype.add = function(frames, value, diff, delta) {
this.value += value;
this.diff = diff;
if (delta){
this.timeshare += value * diff
} else {
this.timeshare += value
}

if(frames && frames.length > 0) {
var head = frames[0];
var child = this.children[head];
Expand All @@ -19,20 +28,23 @@ Node.prototype.add = function(frames, value) {
this.children[head] = child;
}
frames.splice(0, 1);
child.add(frames, value);
child.add(frames, value, diff, delta);
}
}

Node.prototype.serialize = function() {
Node.prototype.serialize = function(timestep) {
var res = {
'name': this.name,
'value': this.value
'value': this.value,
'diff': this.diff,
'timeshare': this.timeshare,
'tottime': this.timeshare * timestep
}

var children = []

for(var key in this.children) {
children.push(this.children[key].serialize());
children.push(this.children[key].serialize(timestep));
}

if(children.length > 0) res['children'] = children;
Expand Down Expand Up @@ -147,16 +159,32 @@ function raw(filename, live) {
});
}

function folded(filename) {
function folded(filename, negate) {
fs.readFile(filename, 'utf8', function (err, data) {
if (err) throw err;
var root = new Node('root');
var time;
var delta = false;
data.split("\n").map(function (val) {
var regex = /(.*) (.*)/g;
if (val.startsWith("REALTIME:")){
time = parseFloat(val.split(' ')[1]);
return true;
} else if (val.startsWith("TIMEDELTA:")){
time = parseFloat(val.split(' ')[1]);
delta = true;
return true;
}
var regex = /(.*) (.*) (.*)/g;
var matches = regex.exec(val);
if (matches) root.add(matches[1].split(";"), parseInt(matches[2]));
if (matches){
var value = parseInt(matches[2]);
var diff = parseInt(matches[3]);
if (negate) diff = diff * -1;
root.add(matches[1].split(";"), value, diff, delta);
}
});
console.log(JSON.stringify(root.serialize(), null, 2));
var timestep = time / root.timeshare;
console.log(JSON.stringify(root.serialize(timestep), null, 2));
});
}

Expand All @@ -165,9 +193,10 @@ program
.arguments('<filename>')
.option('-f, --folded', 'Input is a folded stack.')
.option('-l, --live', 'Output includes a timestamp dimension for live flame graphs.')
.option('-n, --negate', 'Flip the sign of the diffs')
.action(function(filename, options) {
if(options.folded) {
folded(filename);
folded(filename, options.negate);
} else if (options.live) {
raw(filename, true);
} else {
Expand Down