Deno boosts language server performance

"Deno Land developers have reworked many aspects of the Deno language server, commonly referred to as Deno LSP, which provides auto-completion in the editor and other capabilities. With Deno 1.43, auto-completion now takes less than one second in larger projects when it used to take six to eight seconds, Deno Land said. As for memory consumption, projects that previously caused out-of-memory errors in the LSP now operate without issue."

"Deno 1.43 brings two improvements to the JSX transform. Developers now can use the jsxPrecompileSkipElements compiler option to prevent an element from being precompiled to allow passing additional properties to it. Also, a new j sxImportSourceTypes pragma and compiler option allows for specifying types for automatic JSX transform. This is considered useful to use with libraries that do not provide their types, Deno Land said."

"Support for V8 caching, also known as bytecode caching, can significantly improve the time an application spends on parsing and compiling JavaScript modules. Updates to deno.serve() allow developers to get information if the response was sent successfully or if there was a failure using the Deno.ServeHandlerInfo.completed promise. Also, the AbortSignalcode attached to the Request argument always will be aborted when"

Deno 1.43 is available via the deno upgrade command. The Deno language server (Deno LSP) has been reworked to deliver much faster auto-completion—now under one second in large projects—and to reduce memory consumption, preventing previous out-of-memory LSP errors. Two JSX transform improvements were added: the jsxPrecompileSkipElements compiler option to prevent element precompilation and the jsxImportSourceTypes pragma and compiler option to specify types for automatic JSX transform for libraries that lack types. Node.js and npm compatibility was improved around node:worker_threads and node.vm. Additional changes include a declarative deno serve subcommand, V8 bytecode caching support, deno.std stabilization progress, and deno.serve() updates with Deno.ServeHandlerInfo.completed and consistent AbortSignal behavior.

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