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Decode main.js.map during snapshotting.

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Pro:
time ./out/debug/deno tests/error_001.ts  3.0s -> 0.4s

Con:
time ./tool/build.py snapshot              33s -> 1m52s
out/debug/gen/snapshot_deno.bin            39M -> 121M
This commit is contained in:
Ryan Dahl 2018-10-25 11:00:14 -04:00
parent 27ecfc1617
commit b3400d822f
4 changed files with 21 additions and 13 deletions
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6
js/compiler.ts
View file

@ -388,6 +388,7 @@ export class DenoCompiler
let lastModule: ModuleMetaData | undefined;
sourceMaps.install({
installPrepareStackTrace: true,
getGeneratedContents: (fileName: string): string | RawSourceMap => {
this._log("compiler.getGeneratedContents", fileName);
if (fileName === "gen/bundle/main.js") {
@ -419,6 +420,11 @@ export class DenoCompiler
}
}
});
// Pre-compute source maps for main.js.map. This will happen at compile-time
// as long as Compiler is instanciated before the snapshot is created..
const consumer = sourceMaps.loadConsumer("gen/bundle/main.js");
assert(consumer != null);
consumer!.computeColumnSpans();
}
private constructor() {