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Merge pull request #11118 from Snuffleupagus/FetchBuiltInCMap-sendWithStream

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Transfer, rather than copy, CMap data to the worker-thread
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Tim van der Meij 2019-09-06 22:56:14 +02:00 • committed by GitHub
commit 37d5b80ba8
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2 changed files with 36 additions and 5 deletions
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20
src/core/evaluator.js
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@ -78,8 +78,24 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
if (this.builtInCMapCache.has(name)) {
return this.builtInCMapCache.get(name);
}
const data = await this.handler.sendWithPromise('FetchBuiltInCMap',
{ name, });
const readableStream = this.handler.sendWithStream('FetchBuiltInCMap', {
name,
});
const reader = readableStream.getReader();
const data = await new Promise(function(resolve, reject) {
function pump() {
reader.read().then(function({ value, done, }) {
if (done) {
return;
}
resolve(value);
pump();
}, reject);
}
pump();
});
if (data.compressionType !== CMapCompressionType.NONE) {
// Given the size of uncompressed CMaps, only cache compressed ones.
this.builtInCMapCache.set(name, data);