How deno load main.ts about guide HOT 2 CLOSED

@clinyong
denoMain(); comes from the snapshot:
Snapshot creator
In BUILD.gn, this snapshot creator is invoked against bundle/main.js, which is a bundle for all the compiled TS files:

# Generates $target_gen_dir/snapshot_deno.bin
snapshot("snapshot_deno") {
  source_root = "$target_gen_dir/bundle/main.js"
  deps = [
    ":main_bundle",
  ]
}

When creating the new Isolate in Rust, the generated snapshot_deno.bin is loaded to v8. See functions in libdeno/api.cc and src/isolate_init.rs for details.
Snapshot is essentially a serialization of what is on the V8 heap. Once loaded, V8 would restore to the state when the snapshot is taken: the moment bundle/main.js has finished execute.

This is why denoMain() exists on V8 heap

from guide.

@kevinkassimo Thanks so much~

from guide.