![]() ![]() ![]() This gets even harder for languages where the token language is not regular, such as TypeScript with JSX:ĭoes the bracket at match the bracket at or at ? This depends on the length of the template literal expression, which only a tokenizer with unbounded state (which is a non-regular tokenizer) can determine correctly. Thus, even in Bracket Pair Colorizer 2, it takes some time until the colors reflect the new nesting levels after inserting " closes the bracket pair. However, VS Code's API and extension architecture was not designed to allow for high performance bracket pair colorization when hundreds of thousands of bracket pairs are involved. Luckily, VS Code's architectureĮnsures that the UI remains responsive and documents can still be saved to disk.ĬoenraadS was aware of this performance issue and spent a great amount of effort on increasing speed and accuracy in version 2 of the extension, by reusing the token and bracket parsing engine from VS Code. Unfortunately, the non-incremental nature of the Decoration API and missing access to VS Code's token information causes the Bracket Pair Colorizer extension to be slow on large files: when inserting a single bracket at the beginning of the checker.ts file of the TypeScript project, which has more than 42k lines of code, it takes about 10 seconds until the colors of all bracket pairs update.ĭuring these 10 seconds of processing, the extension host process burns at 100% CPU and all features that are powered by extensions, such as auto-completion or diagnostics, stop functioning. This variety of extensions shows that there is a real desire by VS Code users to get better support for brackets. We are pleased to see that the VS Code Marketplace offers many more such community-provided extensions, all of which help identify matching bracket pairs in very creative ways, including: Rainbow Brackets, Subtle Match Brackets, Bracket Highlighter, Blockman, and Bracket Lens. The Bracket Pair Colorizer extension is a good example of the power of VS Code's extensibility and makes heavy use of the Decoration API to colorize brackets. To address performance and accuracy problems, in 2018, CoenraadS followed up with Bracket Pair Colorizer 2, which now also has over 3 millions of installs. This extension became very popular and now is one of the 10 most downloaded extensions on the Marketplace, with over 6 million installs. To make this easier, in 2016, a user named CoenraadS developed the awesome Bracket Pair Colorizer extension to colorize matching brackets and published it to the VS Code Marketplace. ![]() Septemby Henning Dieterichs, dealing with deeply nested brackets in Visual Studio Code, it can be hard to figure out which brackets match and which do not. ![]()
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