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Cache results for readFile, fileExists, directory exists, sourceFiles for .d.ts files across the build (only first time)

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This commit is contained in:
Sheetal Nandi
2018-11-20 13:26:14 -08:00
parent 94d7e30393
commit 6a37fd46fe
3 changed files with 114 additions and 7 deletions
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17
src/compiler/program.ts
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@@ -73,7 +73,6 @@ namespace ts {
// TODO(shkamat): update this after reworking ts build API
export function createCompilerHostWorker(options: CompilerOptions, setParentNodes?: boolean, system = sys): CompilerHost {
const existingDirectories = createMap<boolean>();
function getCanonicalFileName(fileName: string): string {
// if underlying system can distinguish between two files whose names differs only in cases then file name already in canonical form.
// otherwise use toLowerCase as a canonical form.
@@ -84,7 +83,7 @@ namespace ts {
let text: string | undefined;
try {
performance.mark("beforeIORead");
text = system.readFile(fileName, options.charset);
text = host.readFile(fileName);
performance.mark("afterIORead");
performance.measure("I/O Read", "beforeIORead", "afterIORead");
}
@@ -113,7 +112,12 @@ namespace ts {
if (directoryPath.length > getRootLength(directoryPath) && !directoryExists(directoryPath)) {
const parentDirectory = getDirectoryPath(directoryPath);
ensureDirectoriesExist(parentDirectory);
system.createDirectory(directoryPath);
if (host.createDirectory) {
host.createDirectory(directoryPath);
}
else {
system.createDirectory(directoryPath);
}
}
}
@@ -177,8 +181,7 @@ namespace ts {
const newLine = getNewLineCharacter(options, () => system.newLine);
const realpath = system.realpath && ((path: string) => system.realpath!(path));
return {
const host: CompilerHost = {
getSourceFile,
getDefaultLibLocation,
getDefaultLibFileName: options => combinePaths(getDefaultLibLocation(), getDefaultLibFileName(options)),
@@ -194,8 +197,10 @@ namespace ts {
getEnvironmentVariable: name => system.getEnvironmentVariable ? system.getEnvironmentVariable(name) : "",
getDirectories: (path: string) => system.getDirectories(path),
realpath,
readDirectory: (path, extensions, include, exclude, depth) => system.readDirectory(path, extensions, include, exclude, depth)
readDirectory: (path, extensions, include, exclude, depth) => system.readDirectory(path, extensions, include, exclude, depth),
createDirectory: d => system.createDirectory(d)
};
return host;
}
export function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<Diagnostic> {