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Merge pull request #25048 from RyanCavanaugh/cachePathsInSourceMaps

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Do fewer calls to getRelativePathToDirectoryOrUrl when writing sourcemaps
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Ryan Cavanaugh 2018-06-19 09:35:33 +12:00 committed by GitHub
commit e060871e85
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1 changed files with 13 additions and 8 deletions
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21
src/compiler/sourcemap.ts
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@ -390,19 +390,24 @@ namespace ts {
const firstLineColumnOffset = writer.getColumn();
// First, decode the old component sourcemap
const originalMap = parsed;
const sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
const resolvedPathCache = createMap<string>();
sourcemaps.calculateDecodedMappings(originalMap, (raw): void => {
// Apply offsets to each position and fixup source entries
const rawPath = originalMap.sources[raw.sourceIndex];
const relativePath = originalMap.sourceRoot ? combinePaths(originalMap.sourceRoot, rawPath) : rawPath;
const combinedPath = combinePaths(getDirectoryPath(node.sourceMapPath!), relativePath);
const sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
const resolvedPath = getRelativePathToDirectoryOrUrl(
sourcesDirectoryPath,
combinedPath,
host.getCurrentDirectory(),
host.getCanonicalFileName,
/*isAbsolutePathAnUrl*/ true
);
if (!resolvedPathCache.has(combinedPath)) {
resolvedPathCache.set(combinedPath, getRelativePathToDirectoryOrUrl(
sourcesDirectoryPath,
combinedPath,
host.getCurrentDirectory(),
host.getCanonicalFileName,
/*isAbsolutePathAnUrl*/ true
));
}
const resolvedPath = resolvedPathCache.get(combinedPath)!;
const absolutePath = getNormalizedAbsolutePath(resolvedPath, sourcesDirectoryPath);
// tslint:disable-next-line:no-null-keyword
setupSourceEntry(absolutePath, originalMap.sourcesContent ? originalMap.sourcesContent[raw.sourceIndex] : null); // TODO: Lookup content for inlining?