--- title: "Who needs Graphviz when you can build it yourself?" url: https://daily.dev/posts/who-needs-graphviz-when-you-can-build-it-yourself--6dg9rsfhp source_url: https://spidermonkey.dev/blog/2025/10/28/iongraph-web.html type: article source: "SpiderMonkey" published: 2025-10-28T19:37:55.906Z updated: 2025-12-08T02:20:36.675Z tags: ["algorithms", "compiler", "data-visualization", "javascript", "webassembly"] reading_time: 18 upvotes: 5 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Who needs Graphviz when you can build it yourself? **[SpiderMonkey](https://daily.dev/sources/spidermonkey)** · 18 min read · 5 upvotes · 0 comments ## Summary SpiderMonkey's team built a custom graph layout algorithm for visualizing compiler optimizations, replacing Graphviz with a simpler approach tailored to control flow graphs. The new tool produces stable, readable layouts in milliseconds instead of minutes by leveraging domain knowledge about reducible control flow and loop structures. The algorithm uses a modified Sugiyama approach with five steps: layering blocks by depth, creating dummy nodes for multi-layer edges, straightening edges through iterative passes, tracking horizontal edge placement, and assigning vertical positions. This human-centric design philosophy prioritizes predictability and readability over mathematical optimization, resulting in faster performance and more intuitive visualizations of JavaScript and WebAssembly compilation. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Adding Iongraph support to ZJIT](https://daily.dev/posts/adding-iongraph-support-to-zjit-nfdediz81) · RUBYLAND · 0 upvotes · 0 comments --- Tags: [#algorithms](https://daily.dev/tags/algorithms), [#compiler](https://daily.dev/tags/compiler), [#data-visualization](https://daily.dev/tags/data-visualization), [#javascript](https://daily.dev/tags/javascript), [#webassembly](https://daily.dev/tags/webassembly) [View this post on daily.dev](https://daily.dev/posts/who-needs-graphviz-when-you-can-build-it-yourself--6dg9rsfhp)