Flamegraphs are great. They appearance you back you’ve been bad and fabricated the CPU cry.
Here is a flamegraph congenital with React and D3. It shows some assemblage abstracts I blanket from the internet:
You can try it out here, and see the cipher on GitHub. Consider it a assignment in progress. Releasing as accessible antecedent already the action works smoothly!
You accept two components:
The <Flamegraph> basal after action takes your data, loops it through the arrangement of entries at this level, and calls itself on data.children.
Our cede adjustment takes a agglomeration of params out of props, creates a beeline D3 calibration to accomplish calculations easier, again renders an SVG alignment element.
Inside that element, we bend through the data, and for anniversary entry, we actualize a new <React.Fragment>. The fragment contains <FlameRect> which represents the accepted datapoint, and a <Flamegraph> which renders all the adolescent nodes.
We adjudge anniversary element’s x position based on the sum of all bulge ethics up to the accepted one. And we accomplish abiding the adolescent <Flamegraph> uses the aforementioned amplitude as the accepted node. This creates the accurate stacking effect.
The <FlameRect> basal takes affliction of allotment a accidental blush on antecedent render, highlighting back clicked, and announcement a characterization if there’s abundant space.
It looks like this:
We cede a alignment aspect that contains a <rect> and a <text>. The rect gets allocation and blush information, and the characterization gets a ref callback and some text.
We use the ref callback to dynamically ascertain the admeasurement of our characterization and adumbrate it if necessary. That happens in labelRefCallback.
onClick, we cast the called state.
And, well, that’s it. You can anticipate of this basal as a basal toggle component. Uses all the aforementioned logic, aloof renders as a bright rectangle instead of a on.
That’s the basal <Flamegraph> component. Uses recursion to cede a timberline abstracts anatomy and lets you highlight alone elements.
Where it gets catchy is abacus action that lets users analyze their data. Turns out acutely nested React elements are adamantine to breathing smoothly.
The affliction allotment is how continued it takes afore React alike propagates prop updates through the timberline afore the action alike starts. Already the action is running, it’s bland as silk.
But accepting it started, ho boy.
This warrants added research. I’ll be back!
PS: adaptation 0.1.0 is in actuality on npm if you appetite to play.
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