languages/dart-sdk
languages/dart-sdk
1
0
Fork 0
mirror of https://github.com/dart-lang/sdk synced 2024-09-16 00:58:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

Minor updates to frontend perf tool: warm up & derive .packages directly.

Browse source 
BUG=
R=paulberry@google.com

Review URL: https://codereview.chromium.org/2405943002 .
This commit is contained in:
Sigmund Cherem 2016-10-10 14:54:21 -07:00
parent 1324220ede
commit e79c120827
1 changed files with 53 additions and 22 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

75
pkg/analyzer_cli/tool/perf.dart
View file

@ -5,6 +5,7 @@
/// An entrypoint used to run portions of analyzer and measure its performance.
library analyzer_cli.tool.perf;
import 'dart:async';
import 'dart:io' show exit;
import 'package:analyzer/dart/ast/ast.dart';
@ -23,33 +24,36 @@ import 'package:analyzer/src/generated/source.dart';
import 'package:analyzer/src/generated/source_io.dart';
import 'package:package_config/discovery.dart';
/// Cummulative total number of chars scanned.
/// Cumulative total number of chars scanned.
int scanTotalChars = 0;
/// Cummulative time spent scanning.
/// Cumulative time spent scanning.
Stopwatch scanTimer = new Stopwatch();
/// Factory to load and resolve app, packages, and sdk sources.
SourceFactory sources;
main(args) {
main(List<String> args) async {
// TODO(sigmund): provide sdk folder as well.
if (args.length < 3) {
print('usage: perf.dart <bench-id> <package-root> <entry.dart>');
if (args.length < 2) {
print('usage: perf.dart <bench-id> <entry.dart>');
exit(1);
}
var totalTimer = new Stopwatch()..start();
var bench = args[0];
var packageRoot = Uri.base.resolve(args[1]);
var entryUri = Uri.base.resolve(args[2]);
var entryUri = Uri.base.resolve(args[1]);
await setup(entryUri);
setup(packageRoot);
if (bench == 'scan') {
scanReachableFiles(entryUri);
Set<Source> files = scanReachableFiles(entryUri);
// TODO(sigmund): consider replacing the warmup with instrumented snapshots.
for (int i = 0; i < 10; i++) scanFiles(files);
} else if (bench == 'parse') {
Set<Source> files = scanReachableFiles(entryUri);
parseFiles(files);
// TODO(sigmund): consider replacing the warmup with instrumented snapshots.
for (int i = 0; i < 10; i++) parseFiles(files);
} else {
print('unsupported bench-id: $bench. Please specify "scan" or "parse"');
// TODO(sigmund): implement the remaining benchmarks.
@ -62,10 +66,10 @@ main(args) {
/// Sets up analyzer to be able to load and resolve app, packages, and sdk
/// sources.
void setup(Uri packageRoot) {
Future setup(Uri entryUri) async {
var provider = PhysicalResourceProvider.INSTANCE;
var packageMap = new ContextBuilder(provider, null, null)
.convertPackagesToMap(getPackagesDirectory(packageRoot));
.convertPackagesToMap(await findPackages(entryUri));
sources = new SourceFactory([
new ResourceUriResolver(provider),
new PackageMapUriResolver(provider, packageMap),
@ -80,16 +84,25 @@ Set<Source> scanReachableFiles(Uri entryUri) {
var files = new Set<Source>();
var loadTimer = new Stopwatch()..start();
collectSources(sources.forUri2(entryUri), files);
collectSources(sources.forUri("dart:async"), files);
collectSources(sources.forUri("dart:collection"), files);
collectSources(sources.forUri("dart:convert"), files);
collectSources(sources.forUri("dart:core"), files);
collectSources(sources.forUri("dart:developer"), files);
collectSources(sources.forUri("dart:_internal"), files);
collectSources(sources.forUri("dart:isolate"), files);
collectSources(sources.forUri("dart:math"), files);
collectSources(sources.forUri("dart:mirrors"), files);
collectSources(sources.forUri("dart:typed_data"), files);
var libs = [
"dart:async",
"dart:collection",
"dart:convert",
"dart:core",
"dart:developer",
"dart:_internal",
"dart:isolate",
"dart:math",
"dart:mirrors",
"dart:typed_data",
"dart:io"
];
for (var lib in libs) {
collectSources(sources.forUri(lib), files);
}
loadTimer.stop();
print('input size: ${scanTotalChars} chars');
@ -99,6 +112,24 @@ Set<Source> scanReachableFiles(Uri entryUri) {
return files;
}
/// Scans every file in [files] and reports the time spent doing so.
void scanFiles(Set<Source> files) {
// The code below will record again how many chars are scanned and how long it
// takes to scan them, even though we already did so in [scanReachableFiles].
// Recording and reporting this twice is unnecessary, but we do so for now to
// validate that the results are consistent.
scanTimer = new Stopwatch();
var old = scanTotalChars;
scanTotalChars = 0;
for (var source in files) {
tokenize(source);
}
// Report size and scanning time again. See discussion above.
if (old != scanTotalChars) print('input size changed? ${old} chars');
report("scan", scanTimer.elapsedMicroseconds);
}
/// Parses every file in [files] and reports the time spent doing so.
void parseFiles(Set<Source> files) {
// The code below will record again how many chars are scanned and how long it