Revert "[dartdevc] record metrics"

This reverts commit 73347e0.

This is breaking the internal build.

TBR=grouma,sigmund

Change-Id: Iad093ddb8c996cd65571d00b3d711453358a4f26
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/139001
Reviewed-by: Vijay Menon <vsm@google.com>
Commit-Queue: Vijay Menon <vsm@google.com>

Author: vsmenon

pkg/dev_compiler/lib/js/legacy/dart_library.js

@@ -25,48 +25,6 @@ if (!dart_library) {
   const libraryImports = Symbol('libraryImports');
   dart_library.libraryImports = libraryImports;
 
-  const _metrics = Symbol('metrics');
-  const _logMetrics = false;
-
-
-  // Returns a map from module name to various metrics for
-  // module.
-  function metrics() {
-    var map = {};
-    var keys = Array.from(_libraries.keys());
-    for (var key of keys) {
-      var lib = _libraries.get(key);
-      map[lib._name] = lib._library[_metrics];
-    }
-    return map;
-  }
-  dart_library.metrics = metrics;
-
-  function _sortFn(key1, key2) {
-    var t1 = _libraries.get(key1)._library[_metrics].loadTime;
-    var t2 = _libraries.get(key2)._library[_metrics].loadTime;
-    return t1 - t2;
-  }
-
-  // Convenience method to print the metrics in the browser console
-  // in CSV format.
-  function metricsCsv() {
-    var buffer = 'Module, JS Size, Dart Size, Load Time, Cumulative JS Size\n';
-    var keys = Array.from(_libraries.keys());
-    keys.sort(_sortFn);
-    var cumulativeJsSize = 0;
-    for (var key of keys) {
-      var lib = _libraries.get(key);
-      var jsSize = lib._library[_metrics].jsSize;
-      cumulativeJsSize += jsSize;
-      var dartSize = lib._library[_metrics].dartSize;
-      var loadTime = lib._library[_metrics].loadTime;
-      buffer += '"' + lib._name + '", ' + jsSize + ', ' + dartSize + ', ' + loadTime + ', ' + cumulativeJsSize+ '\n';
-    }
-    return buffer;
-  }
-  dart_library.metricsCsv = metricsCsv;
-
   // Module support.  This is a simplified module system for Dart.
   // Longer term, we can easily migrate to an existing JS module system:
   // ES6, AMD, RequireJS, ....
@@ -102,7 +60,7 @@ if (!dart_library) {
   let _reverseImports = new Map();
   class LibraryLoader {
 
-    constructor(name, defaultValue, imports, loader, data) {
+    constructor(name, defaultValue, imports, loader) {
       imports.forEach(function (i) {
         let deps = _reverseImports.get(i);
         if (!deps) {
@@ -115,9 +73,6 @@ if (!dart_library) {
       this._library = defaultValue ? defaultValue : {};
       this._imports = imports;
       this._loader = loader;
-      data.jsSize = loader.toString().length;
-      data.loadTime = Infinity;
-      this._library[_metrics] = data;
 
       // Cyclic import detection
       this._state = LibraryLoader.NOT_LOADED;
@@ -153,26 +108,15 @@ if (!dart_library) {
 
       if (this._name == 'dart_sdk') {
         // Eagerly load the SDK.
-        library[_metrics].loadTime = window.performance.now();
-        if (_logMetrics) console.time('Load ' + this._name);
         this._loader.apply(null, args);
-        if (_logMetrics) console.timeEnd('Load ' + this._name);
-        loader._loader = null;
       } else {
         // Load / parse other modules on demand.
         let done = false;
         this._library = new Proxy(library, {
-          get: function(o, name) {
-            if (name == _metrics) {
-              return o[name];
-            }
+          get: function (o, name) {
             if (!done) {
               done = true;
-              library[_metrics].loadTime = window.performance.now();
-              if (_logMetrics) console.time('Load ' + loader._name);
               loader._loader.apply(null, args);
-              if (_logMetrics) console.timeEnd('Load ' + loader._name);
-              loader._loader = null;
             }
             return o[name];
           }
@@ -214,13 +158,13 @@ if (!dart_library) {
     deps.forEach(_invalidateLibrary);
   }
 
-  function library(name, defaultValue, imports, loader, data = {}) {
+  function library(name, defaultValue, imports, loader) {
     let result = _libraries.get(name);
     if (result) {
       console.log('Re-loading ' + name);
       _invalidateLibrary(name);
     }
-    result = new LibraryLoader(name, defaultValue, imports, loader, data);
+    result = new LibraryLoader(name, defaultValue, imports, loader);
     _libraries.set(name, result);
     return result;
   }
@@ -302,6 +246,7 @@ if (!dart_library) {
 
     /// Once the `onReloadStart()` completes, this finishes the restart.
     function finishHotRestart() {
+      window.console.clear();
       if (clearState) {
         // This resets all initialized fields and clears type caches and other
         // temporary data structures used by the compiler/SDK.

pkg/dev_compiler/lib/src/compiler/module_builder.dart

@@ -68,14 +68,10 @@ void addModuleFormatOptions(ArgParser argParser, {bool hide = true}) {
 /// structure as possible with the original. The transformation is a shallow one
 /// that affects the top-level module items, especially [ImportDeclaration]s and
 /// [ExportDeclaration]s.
-Program transformModuleFormat(ModuleFormat format, Program module,
-    {Expression compileTimeStatistics}) {
+Program transformModuleFormat(ModuleFormat format, Program module) {
   switch (format) {
     case ModuleFormat.ddc:
-      // Legacy format always generates output compatible with single file mode.
-      return DdcModuleBuilder(
-              compileTimeStatistics: compileTimeStatistics ?? LiteralNull())
-          .build(module);
+      return DdcModuleBuilder().build(module);
     case ModuleFormat.common:
       return CommonJSModuleBuilder().build(module);
     case ModuleFormat.amd:
@@ -132,9 +128,6 @@ abstract class _ModuleBuilder {
 /// Generates modules for with our DDC `dart_library.js` loading mechanism.
 // TODO(jmesserly): remove this and replace with something that interoperates.
 class DdcModuleBuilder extends _ModuleBuilder {
-  final Expression compileTimeStatistics;
-  DdcModuleBuilder({this.compileTimeStatistics});
-
   Program build(Program module) {
     // Collect imports/exports/statements.
     visitProgram(module);
@@ -192,13 +185,12 @@ class DdcModuleBuilder extends _ModuleBuilder {
         js.fun("function(#) { 'use strict'; #; }", [parameters, statements]),
         true);
 
-    var moduleDef = js.statement('dart_library.library(#, #, #, #, #)', [
+    var moduleDef = js.statement('dart_library.library(#, #, #, #)', [
       js.string(module.name, "'"),
       LiteralNull(),
       js.commentExpression(
           'Imports', ArrayInitializer(importNames, multiline: true)),
-      resultModule,
-      compileTimeStatistics
+      resultModule
     ]);
     return Program(<ModuleItem>[moduleDef]);
   }

pkg/dev_compiler/lib/src/kernel/command.dart

@@ -401,8 +401,6 @@ Future<CompilerResult> _compile(List<String> args,
 
   var jsModule = compiler.emitModule(compiledLibraries);
 
-  var statistics = computeCompileTimeStatistics(compiledLibraries);
-
   // Also the old Analyzer backend had some code to make debugging better when
   // --single-out-file is used, but that option does not appear to be used by
   // any of our build systems.
@@ -417,8 +415,7 @@ Future<CompilerResult> _compile(List<String> args,
         jsUrl: p.toUri(output).toString(),
         mapUrl: p.toUri(output + '.map').toString(),
         customScheme: multiRootScheme,
-        multiRootOutputPath: multiRootOutputPath,
-        compileTimeStatistics: statistics);
+        multiRootOutputPath: multiRootOutputPath);
 
     outFiles.add(file.writeAsString(jsCode.code));
     if (jsCode.sourceMap != null) {
@@ -528,40 +525,6 @@ Future<CompilerResult> compileSdkFromDill(List<String> args) async {
   return CompilerResult(0);
 }
 
-// Compute statistics (e.g., code size) to embed in the generated JavaScript
-// for this module.
-//
-// This is intended to be used by our build/debug tools to gather metrics.
-// See pkg/dev_compiler/lib/js/legacy/dart_library.js for runtime code that
-// reads this.
-//
-// These keys (see corresponding logic in dart_library.js) include:
-// - dartSize: <size of Dart input code in bytes>
-// TODO(vsm): Add source map size.
-//
-// TODO(vsm): Ideally, this information is never sent to the browser.  I.e.,
-// our runtime metrics gathering would obtain this information from the
-// compilation server, not the browser.  We don't yet have the infra for that.
-js_ast.ObjectInitializer computeCompileTimeStatistics(Component component) {
-  var dartSize = 0;
-  var uriToSource = component.uriToSource;
-  for (var lib in component.libraries) {
-    var libUri = lib.fileUri;
-    var source = uriToSource[libUri];
-    dartSize += source.source.length;
-    for (var part in lib.parts) {
-      var partUri = libUri.resolve(part.partUri);
-      var partSource = uriToSource[partUri];
-      // TODO(vsm): If we're compiling from dill, `partSource.source` can be
-      // `null`.  Today, we only do this for the SDK externally, which does
-      // not go through this path.
-      dartSize += partSource.source.length;
-    }
-  }
-  return js_ast.ObjectInitializer(
-      [js_ast.Property(js.string('dartSize'), js.number(dartSize))]);
-}
-
 /// The output of compiling a JavaScript module in a particular format.
 /// This was copied from module_compiler.dart class "JSModuleCode".
 class JSCode {
@@ -591,8 +554,7 @@ JSCode jsProgramToCode(js_ast.Program moduleTree, ModuleFormat format,
     String mapUrl,
     String sourceMapBase,
     String customScheme,
-    String multiRootOutputPath,
-    js_ast.Expression compileTimeStatistics}) {
+    String multiRootOutputPath}) {
   var opts = js_ast.JavaScriptPrintingOptions(
       allowKeywordsInProperties: true, allowSingleLineIfStatements: true);
   js_ast.SimpleJavaScriptPrintingContext printer;
@@ -605,8 +567,7 @@ JSCode jsProgramToCode(js_ast.Program moduleTree, ModuleFormat format,
     printer = js_ast.SimpleJavaScriptPrintingContext();
   }
 
-  var tree = transformModuleFormat(format, moduleTree,
-      compileTimeStatistics: compileTimeStatistics);
+  var tree = transformModuleFormat(format, moduleTree);
   tree.accept(
       js_ast.Printer(opts, printer, localNamer: js_ast.TemporaryNamer(tree)));
 

pkg/dev_compiler/tool/kernel_sdk.dart

@@ -11,8 +11,6 @@ import 'package:build_integration/file_system/multi_root.dart';
 import 'package:dev_compiler/src/compiler/module_builder.dart';
 import 'package:dev_compiler/src/compiler/shared_command.dart'
     show SharedCompilerOptions;
-import 'package:dev_compiler/src/js_ast/js_ast.dart' as js_ast;
-import 'package:dev_compiler/src/js_ast/js_ast.dart' show js;
 import 'package:dev_compiler/src/kernel/target.dart';
 import 'package:dev_compiler/src/kernel/command.dart';
 import 'package:dev_compiler/src/kernel/compiler.dart';
@@ -89,23 +87,6 @@ Future main(List<String> args) async {
   var compilerResult = await kernelForModule(inputs, options);
   var component = compilerResult.component;
 
-  // TODO(vsm): This is repetitive with kernel/command.dart.  This whole
-  // file should be removed in favor of a direct invocation.
-  var dartSize = 0;
-  var uriToSource = component.uriToSource;
-  for (var lib in component.libraries) {
-    var libUri = lib.fileUri;
-    var source = uriToSource[libUri];
-    dartSize += source.source.length;
-    for (var part in lib.parts) {
-      var partUri = libUri.resolve(part.partUri);
-      var partSource = uriToSource[partUri];
-      dartSize += partSource.source.length;
-    }
-  }
-  var statistics = js_ast.ObjectInitializer(
-      [js_ast.Property(js.string('dartSize'), js.number(dartSize))]);
-
   var outputDir = p.dirname(outputPath);
   await Directory(outputDir).create(recursive: true);
   await writeComponentToBinary(component, outputPath);
@@ -135,8 +116,7 @@ Future main(List<String> args) async {
         jsUrl: jsPath,
         mapUrl: mapPath,
         buildSourceMap: true,
-        customScheme: customScheme,
-        compileTimeStatistics: statistics);
+        customScheme: customScheme);
     await File(jsPath).writeAsString(jsCode.code);
     await File(mapPath).writeAsString(json.encode(jsCode.sourceMap));
   }