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Add uptodate checks for program object to avoid recomputation if not needed

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This commit is contained in:
Mohamed Hegazy 2014-08-04 16:09:25 -07:00
parent 40f6ed0b65
commit acfcf40735
1 changed files with 28 additions and 7 deletions
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35
src/services/services.ts
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@ -1264,21 +1264,43 @@ module ts {
};
}
function sourceFileUpToDate(sourceFile: SourceFile): boolean {
return sourceFile && sourceFile.version === hostCache.getVersion(sourceFile.filename) && sourceFile.isOpen === hostCache.isOpen(sourceFile.filename);
}
function programUpToDate(): boolean {
// If we haven't create a program yet, then it is not up-to-date
if (!program) return false;
// If number of files in the program do not match, it is not up-to-date
var hostFilenames = hostCache.getFilenames();
if (program.getSourceFiles().length !== hostFilenames.length) return false;
// If any file is not up-to-date, then the whole program is not up-to-date
for (var i = 0, n = hostFilenames.length; i < n; i++) {
if (!sourceFileUpToDate(program.getSourceFile(hostFilenames[i])))
return false;
}
// If the compilation settings do no match, then the program is not up-to-date
return compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
}
function synchronizeHostData(): void {
// Reset the cache at start of every refresh
hostCache = new HostCache(host);
// If the program is already up-to-date, we can reuse it
if (programUpToDate()) {
return;
}
var compilationSettings = hostCache.compilationSettings();
// TODO: check if we need to create a new compiler to start with
// 1. files are identical
// 2. compilation settings are identical
// Now, remove any files from the compiler that are no longer in the host.
var oldProgram = program;
if (oldProgram) {
var oldSettings = program.getCompilerOptions();
// If the language version changed, then that affects what types of things we parse. So
// we have to dump all syntax trees.
// TODO: handle propagateEnumConstants
@ -1303,7 +1325,6 @@ module ts {
// doesn't know about it.). Or notify the compiler about any changes (if it does
// know about it.)
var hostfilenames = hostCache.getFilenames();
for (var i = 0, n = hostfilenames.length; i < n; i++) {
var filename = hostfilenames[i];
@ -1316,7 +1337,7 @@ module ts {
//
// If the sourceFile is the same, assume no update
//
if (sourceFile.version === version && sourceFile.isOpen === isOpen) {
if (sourceFileUpToDate(sourceFile)) {
continue;
}