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juce_PerformanceCounter.cpp
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23 namespace juce
24{
25
26 static void appendToFile (const File& f, const String& s)
27{
28 if (f.getFullPathName().isNotEmpty())
29 {
30 FileOutputStream out (f);
31
32 if (! out.failedToOpen())
33 out << s << newLine;
34 }
35}
36
37 PerformanceCounter::PerformanceCounter (const String& name, int runsPerPrintout, const File& loggingFile)
38 : runsPerPrint (runsPerPrintout), startTime (0), outputFile (loggingFile)
39{
40 stats.name = name;
41 appendToFile (outputFile, "**** Counter for \"" + name + "\" started at: " + Time::getCurrentTime().toString (true, true));
42}
43
44 PerformanceCounter::~PerformanceCounter()
45{
46 if (stats.numRuns > 0)
47 printStatistics();
48}
49
50PerformanceCounter::Statistics::Statistics() noexcept
51 : averageSeconds(), maximumSeconds(), minimumSeconds(), totalSeconds(), numRuns()
52{
53}
54
55 void PerformanceCounter::Statistics::clear() noexcept
56{
57 averageSeconds = maximumSeconds = minimumSeconds = totalSeconds = 0;
58 numRuns = 0;
59}
60
61 void PerformanceCounter::Statistics::addResult (double elapsed) noexcept
62{
63 if (numRuns == 0)
64 {
65 maximumSeconds = elapsed;
66 minimumSeconds = elapsed;
67 }
68 else
69 {
70 maximumSeconds = jmax (maximumSeconds, elapsed);
71 minimumSeconds = jmin (minimumSeconds, elapsed);
72 }
73
74 ++numRuns;
75 totalSeconds += elapsed;
76}
77
78 static String timeToString (double secs)
79{
80 return String ((int64) (secs * (secs < 0.01 ? 1000000.0 : 1000.0) + 0.5))
81 + (secs < 0.01 ? " microsecs" : " millisecs");
82}
83
84String PerformanceCounter::Statistics::toString() const
85{
86 MemoryOutputStream s;
87
88 s << "Performance count for \"" << name << "\" over " << numRuns << " run(s)" << newLine
89 << "Average = " << timeToString (averageSeconds)
90 << ", minimum = " << timeToString (minimumSeconds)
91 << ", maximum = " << timeToString (maximumSeconds)
92 << ", total = " << timeToString (totalSeconds);
93
94 return s.toString();
95}
96
97 void PerformanceCounter::start() noexcept
98{
99 startTime = Time::getHighResolutionTicks();
100}
101
102 bool PerformanceCounter::stop()
103{
104 stats.addResult (Time::highResolutionTicksToSeconds (Time::getHighResolutionTicks() - startTime));
105
106 if (stats.numRuns < runsPerPrint)
107 return false;
108
109 printStatistics();
110 return true;
111}
112
113 void PerformanceCounter::printStatistics()
114{
115 const String desc (getStatisticsAndReset().toString());
116
117 Logger::outputDebugString (desc);
118 appendToFile (outputFile, desc);
119}
120
121 PerformanceCounter::Statistics PerformanceCounter::getStatisticsAndReset()
122{
123 Statistics s (stats);
124 stats.clear();
125
126 if (s.numRuns > 0)
127 s.averageSeconds = s.totalSeconds / s.numRuns;
128
129 return s;
130}
131
132} // namespace juce
juce::File
Definition: juce_File.h:41
juce::Logger::outputDebugString
static void JUCE_CALLTYPE outputDebugString(const String &text)
juce::PerformanceCounter::stop
bool stop()
Definition: juce_PerformanceCounter.cpp:102
juce::PerformanceCounter::~PerformanceCounter
~PerformanceCounter()
Definition: juce_PerformanceCounter.cpp:44
juce::PerformanceCounter::getStatisticsAndReset
Statistics getStatisticsAndReset()
Definition: juce_PerformanceCounter.cpp:121
juce::PerformanceCounter::PerformanceCounter
PerformanceCounter(const String &counterName, int runsPerPrintout=100, const File &loggingFile=File())
Definition: juce_PerformanceCounter.cpp:37
juce::PerformanceCounter::start
void start() noexcept
Definition: juce_PerformanceCounter.cpp:97
juce::PerformanceCounter::printStatistics
void printStatistics()
Definition: juce_PerformanceCounter.cpp:113
juce::String
Definition: juce_String.h:39
juce::Time::getHighResolutionTicks
static int64 getHighResolutionTicks() noexcept
juce::Time::getCurrentTime
static Time JUCE_CALLTYPE getCurrentTime() noexcept
Definition: juce_Time.cpp:218
juce::Time::highResolutionTicksToSeconds
static double highResolutionTicksToSeconds(int64 ticks) noexcept
Definition: juce_Time.cpp:278
juce::PerformanceCounter::Statistics
Definition: juce_PerformanceCounter.h:93