perf: cache swc dependency analysis and don't hold onto ParsedSources in memory

[dsherret]

This PR caches swc dependency analysis and changes it so that we don't hold onto ParsedSources anymore while running a program. This means that memory usage is drastically reduced and we have a significant performance improvement because we no longer need to parse sources files on every run.

Memory Usage

Given the following code:

import { Application } from "https://deno.land/x/[email protected]/mod.ts";
import * as test from "https://deno.land/[email protected]/node/module_all.ts";
import chalk from "npm:chalk";

console.log(Application);
console.log(chalk);
console.log(test);

setInterval(() => console.log(5), 5000);

Before: 185MB
After: 39MB

Speed

In the example above, but removing the setInterval:

Before (after first run): ~940ms
After (after first run): ~460ms (removing dep analysis cache, brings it up to 970ms on first run)

For something like just importing ts-morph:

import { Project } from "https://deno.land/x/ts_morph/mod.ts";

console.log(Project);

Before (after first run): ~1080ms
After (after first run): ~225ms

[dsherret]

This should be changed to use a deno_graph::source::MemoryLoader actually. I will do that tomorrow along with adding unit tests for the cache.

[dsherret]

I think I placed this here a few releases back which caused the memory usage regression. I opened #15531

[dsherret]

This get_tsc_roots (a few lines up) being in "emit" doesn't make much sense anymore because tsc never emits anymore (would maybe be good to move it in the future). This function is using has_ts_check in order to completely skip parsing with swc when type checking if module analysis has already occurred once before.

[kitsonk]

Makes sense to me. Open a follow up issue?

[dsherret]

Opened #15535

[kitsonk]

LGTM, no comments outside of what is already marked. Awesome stuff!

[kitsonk]

Makes sense to me. Open a follow up issue?

[bartlomieju]

LGTM