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Fix performance regression when reusing old state

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Fixes: #28025
This commit is contained in:
Klaus Meinhardt 2018-10-21 18:15:01 +02:00
parent 84d1de761b
commit fd6565de65
1 changed files with 13 additions and 24 deletions
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37
src/compiler/program.ts
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@ -574,7 +574,7 @@ namespace ts {
let diagnosticsProducingTypeChecker: TypeChecker;
let noDiagnosticsTypeChecker: TypeChecker;
let classifiableNames: UnderscoreEscapedMap<true>;
let modifiedFilePaths: Path[] | undefined;
let unmodifiedSourceFilesWithAmbientModules: SourceFile[] | undefined;
const cachedSemanticDiagnosticsForFile: DiagnosticCache<Diagnostic> = {};
const cachedDeclarationDiagnosticsForFile: DiagnosticCache<DiagnosticWithLocation> = {};
@ -850,21 +850,14 @@ namespace ts {
return classifiableNames;
}
interface OldProgramState {
program: Program | undefined;
oldSourceFile: SourceFile | undefined;
/** The collection of paths modified *since* the old program. */
modifiedFilePaths: Path[] | undefined;
}
function resolveModuleNamesReusingOldState(moduleNames: string[], containingFile: string, file: SourceFile, oldProgramState: OldProgramState) {
function resolveModuleNamesReusingOldState(moduleNames: string[], containingFile: string, file: SourceFile) {
if (structuralIsReused === StructureIsReused.Not && !file.ambientModuleNames.length) {
// If the old program state does not permit reusing resolutions and `file` does not contain locally defined ambient modules,
// the best we can do is fallback to the default logic.
return resolveModuleNamesWorker(moduleNames, containingFile);
}
const oldSourceFile = oldProgramState.program && oldProgramState.program.getSourceFile(containingFile);
const oldSourceFile = oldProgram && oldProgram.getSourceFile(containingFile);
if (oldSourceFile !== file && file.resolvedModules) {
// `file` was created for the new program.
//
@ -928,7 +921,7 @@ namespace ts {
}
}
else {
resolvesToAmbientModuleInNonModifiedFile = moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState);
resolvesToAmbientModuleInNonModifiedFile = moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName);
}
if (resolvesToAmbientModuleInNonModifiedFile) {
@ -971,12 +964,9 @@ namespace ts {
// If we change our policy of rechecking failed lookups on each program create,
// we should adjust the value returned here.
function moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName: string, oldProgramState: OldProgramState): boolean {
if (!oldProgramState.program) {
return false;
}
const resolutionToFile = getResolvedModule(oldProgramState.oldSourceFile!, moduleName); // TODO: GH#18217
const resolvedFile = resolutionToFile && oldProgramState.program.getSourceFile(resolutionToFile.resolvedFileName);
function moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName: string): boolean {
const resolutionToFile = getResolvedModule(oldSourceFile!, moduleName);
const resolvedFile = resolutionToFile && oldProgram!.getSourceFile(resolutionToFile.resolvedFileName);
if (resolutionToFile && resolvedFile && !resolvedFile.externalModuleIndicator) {
// In the old program, we resolved to an ambient module that was in the same
// place as we expected to find an actual module file.
@ -986,8 +976,8 @@ namespace ts {
}
// at least one of declarations should come from non-modified source file
const firstUnmodifiedFile = oldProgramState.program.getSourceFiles().find(
f => !contains(oldProgramState.modifiedFilePaths, f.path) && contains(f.ambientModuleNames, moduleName)
const firstUnmodifiedFile = unmodifiedSourceFilesWithAmbientModules && unmodifiedSourceFilesWithAmbientModules.find(
f => contains(f.ambientModuleNames, moduleName)
);
if (!firstUnmodifiedFile) {
@ -1188,14 +1178,14 @@ namespace ts {
return oldProgram.structureIsReused;
}
modifiedFilePaths = modifiedSourceFiles.map(f => f.newFile.path);
const modifiedFiles = modifiedSourceFiles.map(f => f.oldFile);
unmodifiedSourceFilesWithAmbientModules = oldSourceFiles.filter((f) => !!f.ambientModuleNames.length && !contains(modifiedFiles, f));
// try to verify results of module resolution
for (const { oldFile: oldSourceFile, newFile: newSourceFile } of modifiedSourceFiles) {
const newSourceFilePath = getNormalizedAbsolutePath(newSourceFile.originalFileName, currentDirectory);
if (resolveModuleNamesWorker) {
const moduleNames = getModuleNames(newSourceFile);
const oldProgramState: OldProgramState = { program: oldProgram, oldSourceFile, modifiedFilePaths };
const resolutions = resolveModuleNamesReusingOldState(moduleNames, newSourceFilePath, newSourceFile, oldProgramState);
const resolutions = resolveModuleNamesReusingOldState(moduleNames, newSourceFilePath, newSourceFile);
// ensure that module resolution results are still correct
const resolutionsChanged = hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, moduleResolutionIsEqualTo);
if (resolutionsChanged) {
@ -2308,8 +2298,7 @@ namespace ts {
if (file.imports.length || file.moduleAugmentations.length) {
// Because global augmentation doesn't have string literal name, we can check for global augmentation as such.
const moduleNames = getModuleNames(file);
const oldProgramState: OldProgramState = { program: oldProgram, oldSourceFile: oldProgram && oldProgram.getSourceFile(file.fileName), modifiedFilePaths };
const resolutions = resolveModuleNamesReusingOldState(moduleNames, getNormalizedAbsolutePath(file.originalFileName, currentDirectory), file, oldProgramState);
const resolutions = resolveModuleNamesReusingOldState(moduleNames, getNormalizedAbsolutePath(file.originalFileName, currentDirectory), file);
Debug.assert(resolutions.length === moduleNames.length);
for (let i = 0; i < moduleNames.length; i++) {
const resolution = resolutions[i];