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-rw-r--r--benchmarks/src/benchmarks/regression/SimpleDateFormatBenchmark.java115
1 files changed, 115 insertions, 0 deletions
diff --git a/benchmarks/src/benchmarks/regression/SimpleDateFormatBenchmark.java b/benchmarks/src/benchmarks/regression/SimpleDateFormatBenchmark.java
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+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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 benchmarks.regression;
+
+import android.icu.text.TimeZoneNames;
+
+import java.text.DateFormatSymbols;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.Locale;
+import java.util.TimeZone;
+
+/**
+ * Benchmark for java.text.SimpleDateFormat. This tests common formatting, parsing and creation
+ * operations with a specific focus on TimeZone handling.
+ */
+public class SimpleDateFormatBenchmark {
+ public void time_createFormatWithTimeZone(int reps) {
+ for (int i = 0; i < reps; i++) {
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd z");
+ }
+ }
+
+ public void time_parseWithTimeZoneShort(int reps) throws ParseException {
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd z");
+ for (int i = 0; i < reps; i++) {
+ sdf.parse("2000.01.01 PST");
+ }
+ }
+
+ public void time_parseWithTimeZoneLong(int reps) throws ParseException {
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd zzzz");
+ for (int i = 0; i < reps; i++) {
+ sdf.parse("2000.01.01 Pacific Standard Time");
+ }
+ }
+
+ public void time_parseWithoutTimeZone(int reps) throws ParseException {
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd");
+ for (int i = 0; i < reps; i++) {
+ sdf.parse("2000.01.01");
+ }
+ }
+
+ public void time_createAndParseWithTimeZoneShort(int reps) throws ParseException {
+ for (int i = 0; i < reps; i++) {
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd z");
+ sdf.parse("2000.01.01 PST");
+ }
+ }
+
+ public void time_createAndParseWithTimeZoneLong(int reps) throws ParseException {
+ for (int i = 0; i < reps; i++) {
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd zzzz");
+ sdf.parse("2000.01.01 Pacific Standard Time");
+ }
+ }
+
+ public void time_formatWithTimeZoneShort(int reps) {
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd z");
+ for (int i = 0; i < reps; i++) {
+ sdf.format(new Date());
+ }
+ }
+
+ public void time_formatWithTimeZoneLong(int reps) {
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd zzzz");
+ for (int i = 0; i < reps; i++) {
+ sdf.format(new Date());
+ }
+ }
+
+ /**
+ * Times first-time execution to measure effects of initial loading of data that's lost in
+ * full caliper benchmarks.
+ */
+ public static void main(String[] args) throws ParseException {
+ long start, end;
+
+ Locale locale = Locale.GERMAN;
+ start = System.nanoTime();
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd zzzz", locale);
+ end = System.nanoTime();
+ System.out.printf("Creating first SDF: %,d ns\n", end-start);
+
+ // N code had special cases for currently-set and for default timezone. We want to measure
+ // the generic case.
+ sdf.setTimeZone(TimeZone.getTimeZone("Hongkong"));
+
+ start = System.nanoTime();
+ sdf.parse("2000.1.1 Kubanische Normalzeit");
+ end = System.nanoTime();
+ System.out.printf("First parse: %,d ns\n", end-start);
+
+ start = System.nanoTime();
+ sdf.format(new Date());
+ end = System.nanoTime();
+ System.out.printf("First format: %,d ns\n", end-start);
+ }
+}