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Changes to enable the PerformanceTracker sans GZIP code size estimate…
…s in the GWT build. As the default PrintStream is a no-op in GWT, this does nothing by itself but in a future CL we can subclass PrintStream and provided in the compiler constructor (this means of providing an alternate to System.out is already supported). ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=130674441
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94 changes: 94 additions & 0 deletions
94
src/com/google/javascript/jscomp/PerformanceTrackerCodeSizeEstimator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /* | ||
| * Copyright 2016 The Closure Compiler Authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.google.javascript.jscomp; | ||
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| import static java.nio.charset.StandardCharsets.UTF_8; | ||
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| import com.google.javascript.rhino.Node; | ||
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| import java.io.ByteArrayOutputStream; | ||
| import java.io.IOException; | ||
| import java.util.zip.GZIPOutputStream; | ||
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| /** A class to get a raw and gzip'ed size estimate; it doesn't generate code. */ | ||
| final class PerformanceTrackerCodeSizeEstimator extends CodeConsumer { | ||
| private int size = 0; | ||
| private char lastChar = '\0'; | ||
| private final ByteArrayOutputStream output; | ||
| private final GZIPOutputStream stream; | ||
| private final boolean trackGzSize; | ||
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| static PerformanceTrackerCodeSizeEstimator estimate(Node jsRoot, boolean trackGzSize) { | ||
| PerformanceTrackerCodeSizeEstimator estimator = new PerformanceTrackerCodeSizeEstimator( | ||
| trackGzSize); | ||
| CodeGenerator.forCostEstimation(estimator).add(jsRoot); | ||
| return estimator; | ||
| } | ||
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| private PerformanceTrackerCodeSizeEstimator(boolean trackGzSize) { | ||
| this.trackGzSize = trackGzSize; | ||
| if (trackGzSize) { | ||
| try { | ||
| output = new ByteArrayOutputStream(); | ||
| stream = new GZIPOutputStream(output); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } else { | ||
| output = null; | ||
| stream = null; | ||
| } | ||
| } | ||
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| @Override | ||
| void append(String str) { | ||
| int len = str.length(); | ||
| if (len > 0) { | ||
| size += len; | ||
| lastChar = str.charAt(len - 1); | ||
| if (trackGzSize) { | ||
| try { | ||
| stream.write(str.getBytes(UTF_8)); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| @Override | ||
| char getLastChar() { | ||
| return lastChar; | ||
| } | ||
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| int getCodeSize() { | ||
| return size; | ||
| } | ||
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| int getZippedCodeSize() { | ||
| if (trackGzSize) { | ||
| try { | ||
| stream.finish(); | ||
| stream.close(); | ||
| return output.size(); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } else { | ||
| return 0; | ||
| } | ||
| } | ||
| } |
25 changes: 25 additions & 0 deletions
25
src/com/google/javascript/jscomp/gwt/super/com/google/javascript/jscomp/JvmMetrics.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| /* | ||
| * Copyright 2016 The Closure Compiler Authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package com.google.javascript.jscomp; | ||
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| import java.io.PrintStream; | ||
|
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| /** No op class for GWT. */ | ||
| class JvmMetrics { | ||
| public static void maybeWriteJvmMetrics(PrintStream out, String options) { | ||
| } | ||
| } |
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