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packager: index files by dir for fast matching

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Summary: This removes the call to `HasteFS#matchFiles()`, that has linear complexity. Instead, we index all the files by directory from `HasteFS` once loaded, a linear operation. Then, we can filter files from a particular directory much quicker.

Reviewed By: davidaurelio

Differential Revision: D4826721

fbshipit-source-id: c31a0ed9a354dbc7f2dcd56179b859e491faa16c
This commit is contained in:
Jean Lauliac
2017-04-06 07:45:36 -07:00
committed by Facebook Github Bot
parent 5f37483466
commit b2101836dc
4 changed files with 96 additions and 13 deletions
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3
packager/src/ModuleGraph/node-haste/node-haste.js
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@@ -22,6 +22,7 @@ import type {
} from '../types.flow';
const DependencyGraphHelpers = require('../../node-haste/DependencyGraph/DependencyGraphHelpers');
const FilesByDirNameIndex = require('../../node-haste/FilesByDirNameIndex');
const HasteFS = require('./HasteFS');
const HasteMap = require('../../node-haste/DependencyGraph/HasteMap');
const Module = require('./Module');
@@ -92,6 +93,7 @@ exports.createResolveFn = function(options: ResolveOptions): ResolveFn {
const hasteMapBuilt = hasteMap.build();
const resolutionRequests = {};
const filesByDirNameIndex = new FilesByDirNameIndex(hasteMap.getAllFiles());
return (id, source, platform, _, callback) => {
let resolutionRequest = resolutionRequests[platform];
if (!resolutionRequest) {
@@ -102,6 +104,7 @@ exports.createResolveFn = function(options: ResolveOptions): ResolveFn {
hasteFS,
hasteMap,
helpers,
matchFiles: filesByDirNameIndex.match.bind(filesByDirNameIndex),
moduleCache,
moduleMap: getFakeModuleMap(hasteMap),
platform,