gulp-typescript's README says it <a href="https://github.com/ivogabe/gulp-typescript#incremental-compilation" target="_blank">supports incremental compilation</a> but doesn't explain what is meant by that term in this context.
gulp-typescript's README says it supports incremental compilation but doesn't explain what is meant by that term in this context.
There's an issue discussing how gulp-typescript incremental compilation is slower than tsc, but it doesn't explain why, or what the difference is.
What is gulp-typescript doing when it does "incremental compilation"?
I'm looking at gulp-typescript's source code and it looks like gulp-typescript isn't doing any incremental compilation at all. When a
Project is created, it closes over an instance of
ProjectInfo, which has an
input member which is a
FileCache. A FileCache is pretty much a mapping from file names to source strings. There isn't much other state that is maintained in a gulp-typescript
In order to do actual incremental compilation (reusing products of the compilation process in subsequent builds) using the TS compiler API, I would expect to see one of the following:
But I don't see either of those in the source.
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