ae.utils.bench source code

1 /**
2  * Simple benchmarking/profiling code
3  *
4  * License:
5  *   This Source Code Form is subject to the terms of
6  *   the Mozilla Public License, v. 2.0. If a copy of
7  *   the MPL was not distributed with this file, You
8  *   can obtain one at http://mozilla.org/MPL/2.0/.
9  *
10  * Authors:
11  *   Vladimir Panteleev <ae@cy.md>
12  */
13 
14 deprecated module ae.utils.bench;
15 
16 // https://issues.dlang.org/show_bug.cgi?id=23965
17 // deprecated:
18 
19 import std.datetime;
20 import ae.sys.timing;
21 
22 MonoTime lastTime;
23 
24 static this()
25 {
26 	lastTime = MonoTime.currTime();
27 }
28 
29 Duration elapsedTime()
30 {
31 	auto c = MonoTime.currTime();
32 	auto d = c - lastTime;
33 	lastTime = c;
34 	return d;
35 }
36 
37 struct TimedAction
38 {
39 	string name;
40 	Duration duration;
41 }
42 
43 TimedAction[] timedActions;
44 size_t[string] timeNameIndices;
45 string currentAction = null;
46 
47 void timeEnd(string action = null)
48 {
49 	if (action && currentAction && action != currentAction)
50 		action = currentAction ~ " / " ~ action;
51 	if (action is null)
52 		action = currentAction;
53 	if (action is null)
54 		action = "other";
55 	currentAction = null;
56 
57 	// ordered
58 	if (action !in timeNameIndices)
59 	{
60 		timeNameIndices[action] = timedActions.length;
61 		timedActions ~= TimedAction(action, elapsedTime());
62 	}
63 	else
64 		timedActions[timeNameIndices[action]].duration += elapsedTime();
65 }
66 
67 
68 void timeStart(string action = null)
69 {
70 	timeEnd();
71 	currentAction = action;
72 }
73 
74 void timeAction(string action, void delegate() p)
75 {
76 	timeStart(action);
77 	p();
78 	timeEnd(action);
79 }
80 
81 void clearTimes()
82 {
83 	timedActions = null;
84 	timeNameIndices = null;
85 	lastTime = MonoTime.currTime();
86 }
87 
88 /// Retrieves current times and clears them.
89 string getTimes()()
90 {
91 	timeEnd();
92 
93 	import std.string, std.array;
94 	string[] lines;
95 	int maxLength;
96 	foreach (action; timedActions)
97 		if (!action.duration.empty)
98 			if (maxLength < action.name.length)
99 				maxLength = action.name.length;
100 	string fmt = format("%%%ds : %%10d (%%s)", maxLength);
101 	foreach (action; timedActions)
102 		if (!action.duration.empty)
103 			lines ~= format(fmt, action.name, action.duration.total!"hnsecs", action.duration);
104 	clearTimes();
105 	return join(lines, "\n");
106 }
107 
108 void dumpTimes()()
109 {
110 	import std.stdio;
111 	import ae.sys.console;
112 	auto times = getTimes();
113 	if (times.length)
114 		writeln(times);
115 }
116 
117 private string[] timeStack;
118 
119 void timePush(string action = null)
120 {
121 	timeStack ~= currentAction;
122 	timeStart(action);
123 }
124 
125 void timePop(string action = null)
126 {
127 	timeEnd(action);
128 	timeStart(timeStack[$-1]);
129 	timeStack = timeStack[0..$-1];
130 }