Function: parse()

• Exported from: rolldown/utils
• Type: (filename: string, sourceText: string, options?: ParserOptions | null) => Promise<ParseResult>

Defined in: utils/parse.ts:38

Parse JS/TS source asynchronously on a separate thread.

Note that not all of the workload can happen on a separate thread. Parsing on Rust side does happen in a separate thread, but deserialization of the AST to JS objects has to happen on current thread. This synchronous deserialization work typically outweighs the asynchronous parsing by a factor of between 3 and 20.

i.e. the majority of the workload cannot be parallelized by using this method.

Generally parseSync is preferable to use as it does not have the overhead of spawning a thread. If you need to parallelize parsing multiple files, it is recommended to use worker threads.

Parameters

filename

string

sourceText

string

options?

ParserOptions | null

Returns

Promise<ParseResult>