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https://github.com/dart-lang/sdk
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add kernel generation to the front_end/tool/perf script
BUG= R=paulberry@google.com Review URL: https://codereview.chromium.org/2439053003 .
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@ -11,3 +11,9 @@ dependencies:
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source_span: '^1.2.3'
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dev_dependencies:
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package_config: '^1.0.0'
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# TODO(sigmund): update to a version constraint once we roll the latest kernel
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# to the repo.
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kernel: {path: ../../third_party/pkg/kernel}
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# TODO(sigmund): remove once kernel is moved into the sdk repo.
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dependency_overrides:
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analyzer: '^0.29.0'
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@ -6,7 +6,7 @@
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library front_end.tool.perf;
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import 'dart:async';
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import 'dart:io' show exit;
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import 'dart:io' show exit, stderr;
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import 'package:analyzer/dart/ast/ast.dart';
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import 'package:analyzer/dart/ast/token.dart';
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@ -22,6 +22,8 @@ import 'package:analyzer/src/dart/sdk/sdk.dart' show FolderBasedDartSdk;
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import 'package:analyzer/src/generated/parser.dart';
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import 'package:analyzer/src/generated/source.dart';
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import 'package:analyzer/src/generated/source_io.dart';
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import 'package:kernel/analyzer/loader.dart';
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import 'package:kernel/kernel.dart';
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import 'package:package_config/discovery.dart';
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/// Cumulative total number of chars scanned.
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@ -46,19 +48,36 @@ main(List<String> args) async {
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await setup(entryUri);
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if (bench == 'scan') {
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Set<Source> files = scanReachableFiles(entryUri);
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// TODO(sigmund): consider replacing the warmup with instrumented snapshots.
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for (int i = 0; i < 10; i++) scanFiles(files);
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} else if (bench == 'parse') {
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Set<Source> files = scanReachableFiles(entryUri);
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// TODO(sigmund): consider replacing the warmup with instrumented snapshots.
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for (int i = 0; i < 10; i++) parseFiles(files);
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} else {
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print('unsupported bench-id: $bench. Please specify "scan" or "parse"');
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var handlers = {
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'scan': () async {
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Set<Source> files = scanReachableFiles(entryUri);
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// TODO(sigmund): replace the warmup with instrumented snapshots.
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for (int i = 0; i < 10; i++) scanFiles(files);
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},
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'parse': () async {
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Set<Source> files = scanReachableFiles(entryUri);
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// TODO(sigmund): replace the warmup with instrumented snapshots.
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for (int i = 0; i < 10; i++) parseFiles(files);
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},
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'kernel_gen_e2e': () async {
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// TODO(sigmund): remove. This is used to compute the input size, we
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// should extract input size from frontend instead.
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scanReachableFiles(entryUri);
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// TODO(sigmund): replace this warmup. Note that for very large programs,
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// the GC pressure on the VM seems to make this worse with time (maybe we
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// are leaking memory?). That's why we run it twice and not 10 times.
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for (int i = 0; i < 2; i++) await generateKernel(entryUri);
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},
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};
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var handler = handlers[bench];
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if (handler == null) {
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// TODO(sigmund): implement the remaining benchmarks.
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print('unsupported bench-id: $bench. Please specify one of the following: '
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'${handler.keys.join(", ")}');
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exit(1);
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}
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await handler();
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totalTimer.stop();
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report("total", totalTimer.elapsedMicroseconds);
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@ -201,3 +220,26 @@ void report(String name, int time) {
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sb.write(', ${scanTotalChars * 1000 ~/ time} chars/ms');
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print('$sb');
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}
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// TODO(sigmund): replace this once kernel is produced by the frontend directly.
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Future<Program> generateKernel(Uri entryUri) async {
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var dartkTimer = new Stopwatch()..start();
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var options = new DartOptions(strongMode: false, sdk: 'sdk');
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var packages =
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await createPackages(options.packagePath, discoveryPath: entryUri.path);
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var repository = new Repository();
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DartLoader loader = new DartLoader(repository, options, packages);
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Program program = loader.loadProgram(entryUri.path);
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List errors = loader.errors;
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if (errors.isNotEmpty) {
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const int errorLimit = 100;
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stderr.writeln(errors.take(errorLimit).join('\n'));
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if (errors.length > errorLimit) {
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stderr.writeln('[error] ${errors.length - errorLimit} errors not shown');
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}
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}
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dartkTimer.stop();
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report("kernel_gen_e2e", dartkTimer.elapsedMicroseconds);
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return program;
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}
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