1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
#[macro_use]
extern crate slog;
use slog::Logger;
use std::time;
use std::collections::HashMap;
pub struct TimeReporter {
times: HashMap<&'static str, time::Duration>,
cur_state_time: Option<(&'static str, time::Instant)>,
log: Logger,
level: slog::Level,
}
impl TimeReporter {
pub fn new<S : Into<String>>(name: S, log: Logger) -> TimeReporter {
let name = name.into();
let log = log.new(o!("name" => name));
TimeReporter {
times: HashMap::new(),
log: log,
cur_state_time: None,
level: slog::Level::Info,
}
}
pub fn new_with_level<S : Into<String>>(name: S, log: Logger, level: slog::Level) -> TimeReporter {
let name = name.into();
let log = log.new(o!("name" => name));
TimeReporter {
times: HashMap::new(),
log: log,
cur_state_time: None,
level: level,
}
}
pub fn start(&mut self, key: &'static str) {
let now = time::Instant::now();
self.save_current(now);
trace!(self.log, "start"; "phase" => key);
self.cur_state_time = Some((key, now))
}
pub fn start_with<F, R>(&mut self, key :&'static str, f: F) -> R
where F: FnOnce() -> R
{
self.start(key);
f()
}
fn save_current(&mut self, now: time::Instant) {
if let Some((key, prev)) = self.cur_state_time.take() {
*self.times
.entry(key)
.or_insert(time::Duration::new(0, 0)) += now - prev;
trace!(self.log, "end"; "phase" => key);
}
}
pub fn stop(&mut self) {
let now = time::Instant::now();
self.save_current(now);
}
pub fn finish(self) {}
}
struct TimeReporterDroper<'a> {
reporter: &'a TimeReporter,
}
impl<'a> slog::KV for TimeReporterDroper<'a> {
fn serialize(&self,
_record: &slog::Record,
ser: &mut slog::Serializer)
-> slog::Result {
let mut stats: Vec<(&'static str, time::Duration)> = self.reporter
.times
.iter()
.map(|(&k, &v)| (k, v))
.collect();
stats.sort_by_key(|s| s.1);
for &(state, dur) in stats.iter().rev() {
ser.emit_arguments(
state,
&format_args!("{}",
dur.as_secs() as f64
+ dur.subsec_nanos() as f64 / 1000000000f64)
)?;
}
Ok(())
}
}
impl Drop for TimeReporter {
fn drop(&mut self) {
self.stop();
debug_assert!(self.cur_state_time.is_none());
let lrd = TimeReporterDroper { reporter: &self };
static LOC : slog::RecordLocation = slog::RecordLocation {
file: file!(),
line: line!(),
column: column!(),
function: "",
module: module_path!(),
};
let record_static = slog::RecordStatic {
location : &LOC,
level: self.level,
tag: "slog_perf",
};
let args = format_args!("time report");
self.log.log(&slog::Record::new(
&record_static,
&args,
slog_b!(lrd),
));
}
}