alt Hacker NewsSource phase imports are stage 3 (recommended for implementation, no major updates expected) in JS. "Import source" tells the runtime to go get the code, but not yet run it. Similar ideas seemingly to what's going on here in python! https://github.com/tc39/proposal-source-phase-imports
This proposal defers even looking for the code. The LazyLoader already in the standard library would eagerly look for code, but just record a file path and not actually store any bytecode data, never mind deserializing or running it.
The rationale described in the PEP is that some systems try to `import`, for example, across a network share, so even searching the filesystem is slow and there is a desire to defer that (and avoid it on runs where the corresponding code isn't executed).