73 lines
1.9 KiB
Java
73 lines
1.9 KiB
Java
package com.earth2me.essentials;
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import java.text.DecimalFormat;
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import java.text.DecimalFormatSymbols;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Locale;
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public class ExecuteTimer {
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private final transient List<ExecuteRecord> times;
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private final transient DecimalFormat decimalFormat = new DecimalFormat("#0.000", DecimalFormatSymbols.getInstance(Locale.US));
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public ExecuteTimer() {
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times = new ArrayList<>();
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}
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public void start() {
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times.clear();
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mark("start");
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}
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public void mark(final String label) {
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if (!times.isEmpty() || "start".equals(label)) {
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times.add(new ExecuteRecord(label, System.nanoTime()));
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}
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}
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public String end() {
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final StringBuilder output = new StringBuilder();
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output.append("execution time: ");
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String mark;
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long time0 = 0;
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long time1 = 0;
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long time2 = 0;
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double duration;
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for (final ExecuteRecord pair : times) {
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mark = pair.getMark();
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time2 = pair.getTime();
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if (time1 > 0) {
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duration = (time2 - time1) / 1000000.0;
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output.append(mark).append(": ").append(decimalFormat.format(duration)).append("ms - ");
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} else {
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time0 = time2;
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}
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time1 = time2;
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}
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duration = (time1 - time0) / 1000000.0;
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output.append("Total: ").append(decimalFormat.format(duration)).append("ms");
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times.clear();
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return output.toString();
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}
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private static class ExecuteRecord {
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private final String mark;
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private final long time;
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ExecuteRecord(final String mark, final long time) {
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this.mark = mark;
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this.time = time;
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}
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public String getMark() {
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return mark;
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}
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public long getTime() {
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return time;
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}
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}
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}
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