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The XSLT and XQuery Processor
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2022 Saxonica Limited
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
package net.sf.saxon.trans;
import net.sf.saxon.functions.AccessorFn;
import net.sf.saxon.value.DayTimeDurationValue;
import net.sf.saxon.value.NumericValue;
import java.math.BigDecimal;
/**
* Utility class for collecting and reporting timing information, used only under diagnostic control
*/
public class Timer {
private static final DayTimeDurationValue milliSecond = new DayTimeDurationValue(1, 0, 0, 0, 0, 1000);
private final long start;
private long prev;
public Timer() {
start = System.nanoTime();
prev = start;
}
public static String showExecutionTimeNano(long nanosecs) {
if (nanosecs < 1e9) {
// time less than one second
return (nanosecs / 1e6) + "ms";
} else {
try {
double millisecs = nanosecs / 1e6;
@SuppressWarnings("RedundantCast")
DayTimeDurationValue d = (DayTimeDurationValue) milliSecond.multiply(millisecs);
long days = ((NumericValue) d.getComponent(AccessorFn.Component.DAY)).longValue();
long hours = ((NumericValue) d.getComponent(AccessorFn.Component.HOURS)).longValue();
long minutes = ((NumericValue) d.getComponent(AccessorFn.Component.MINUTES)).longValue();
BigDecimal seconds = ((NumericValue) d.getComponent(AccessorFn.Component.SECONDS)).getDecimalValue();
StringBuilder fsb = new StringBuilder(256);
if (days > 0) {
fsb.append(days + "days ");
}
if (hours > 0) {
fsb.append(hours + "h ");
}
if (minutes > 0) {
fsb.append(minutes + "m ");
}
fsb.append(seconds + "s");
return fsb.toString() + " (" + nanosecs / 1e6 + "ms)";
} catch (XPathException e) {
return nanosecs / 1e6 + "ms";
}
}
}
public static String showMemoryUsed() {
long value = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
return "Memory used: " + (value / 1_000_000) + "Mb";
}
public void report(String label) {
long time = System.nanoTime();
System.err.println(label + " " + (time - prev)/1e6 + "ms");
prev = time;
}
public void reportCumulative(String label) {
long time = System.nanoTime();
System.err.println(label + " " + (time - start)/1e6 + "ms");
prev = time;
}
}