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v/vlib/benchmark/benchmark.v
2021-07-20 11:17:08 +03:00

219 lines
6.1 KiB
V

module benchmark
import time
import term
pub const (
b_ok = term.ok_message('OK ')
b_fail = term.fail_message('FAIL')
b_skip = term.warn_message('SKIP')
b_spent = term.ok_message('SPENT')
)
pub struct Benchmark {
pub mut:
bench_timer time.StopWatch
verbose bool
no_cstep bool
step_timer time.StopWatch
ntotal int
nok int
nfail int
nskip int
nexpected_steps int
cstep int
bok string
bfail string
}
// new_benchmark returns a `Benchmark` instance on the stack.
pub fn new_benchmark() Benchmark {
return Benchmark{
bench_timer: time.new_stopwatch()
verbose: true
}
}
// new_benchmark_no_cstep returns a new `Benchmark` instance with step counting disabled.
pub fn new_benchmark_no_cstep() Benchmark {
return Benchmark{
bench_timer: time.new_stopwatch()
verbose: true
no_cstep: true
}
}
// new_benchmark_pointer returns a new `Benchmark` instance allocated on the heap.
// This is useful for long-lived use of `Benchmark` instances.
pub fn new_benchmark_pointer() &Benchmark {
return &Benchmark{
bench_timer: time.new_stopwatch()
verbose: true
}
}
// set_total_expected_steps sets the the total amount of steps the benchmark is expected to take.
pub fn (mut b Benchmark) set_total_expected_steps(n int) {
b.nexpected_steps = n
}
// stop stops the internal benchmark timer.
pub fn (mut b Benchmark) stop() {
b.bench_timer.stop()
}
// step increases the step count by 1 and restarts the internal timer.
pub fn (mut b Benchmark) step() {
b.step_timer.restart()
if !b.no_cstep {
b.cstep++
}
}
// fail increases the fail count by 1 and stops the internal timer.
pub fn (mut b Benchmark) fail() {
b.step_timer.stop()
b.ntotal++
b.nfail++
}
// ok increases the ok count by 1 and stops the internal timer.
pub fn (mut b Benchmark) ok() {
b.step_timer.stop()
b.ntotal++
b.nok++
}
// skip increases the skip count by 1 and stops the internal timer.
pub fn (mut b Benchmark) skip() {
b.step_timer.stop()
b.ntotal++
b.nskip++
}
// fail_many increases the fail count by `n` and stops the internal timer.
pub fn (mut b Benchmark) fail_many(n int) {
b.step_timer.stop()
b.ntotal += n
b.nfail += n
}
// ok_many increases the ok count by `n` and stops the internal timer.
pub fn (mut b Benchmark) ok_many(n int) {
b.step_timer.stop()
b.ntotal += n
b.nok += n
}
// neither_fail_nor_ok stops the internal timer.
pub fn (mut b Benchmark) neither_fail_nor_ok() {
b.step_timer.stop()
}
// start returns a new, running, instance of `Benchmark`.
// This is a shorthand for calling `new_benchmark().step()`.
pub fn start() Benchmark {
mut b := new_benchmark()
b.step()
return b
}
// measure prints the current time spent doing `label`, since the benchmark was started.
pub fn (mut b Benchmark) measure(label string) i64 {
b.ok()
res := b.step_timer.elapsed().microseconds()
println(b.step_message_with_label(benchmark.b_spent, 'in $label'))
b.step()
return res
}
// step_message_with_label_and_duration returns a string describing the current step.
pub fn (b &Benchmark) step_message_with_label_and_duration(label string, msg string, sduration time.Duration) string {
timed_line := b.tdiff_in_ms(msg, sduration.microseconds())
if b.nexpected_steps > 1 {
mut sprogress := ''
if b.nexpected_steps < 10 {
sprogress = if b.no_cstep {
'TMP1/${b.nexpected_steps:1d}'
} else {
'${b.cstep:1d}/${b.nexpected_steps:1d}'
}
} else if b.nexpected_steps >= 10 && b.nexpected_steps < 100 {
sprogress = if b.no_cstep {
'TMP2/${b.nexpected_steps:2d}'
} else {
'${b.cstep:2d}/${b.nexpected_steps:2d}'
}
} else if b.nexpected_steps >= 100 && b.nexpected_steps < 1000 {
sprogress = if b.no_cstep {
'TMP3/${b.nexpected_steps:3d}'
} else {
'${b.cstep:3d}/${b.nexpected_steps:3d}'
}
} else {
sprogress = if b.no_cstep {
'TMP4/${b.nexpected_steps:4d}'
} else {
'${b.cstep:4d}/${b.nexpected_steps:4d}'
}
}
return '${label:-5s} [$sprogress] $timed_line'
}
return '${label:-5s}$timed_line'
}
// step_message_with_label returns a string describing the current step using current time as duration.
pub fn (b &Benchmark) step_message_with_label(label string, msg string) string {
return b.step_message_with_label_and_duration(label, msg, b.step_timer.elapsed())
}
// step_message returns a string describing the current step.
pub fn (b &Benchmark) step_message(msg string) string {
return b.step_message_with_label('', msg)
}
// step_message_ok returns a string describing the current step with an standard "OK" label.
pub fn (b &Benchmark) step_message_ok(msg string) string {
return b.step_message_with_label(benchmark.b_ok, msg)
}
// step_message_fail returns a string describing the current step with an standard "FAIL" label.
pub fn (b &Benchmark) step_message_fail(msg string) string {
return b.step_message_with_label(benchmark.b_fail, msg)
}
// step_message_skip returns a string describing the current step with an standard "SKIP" label.
pub fn (b &Benchmark) step_message_skip(msg string) string {
return b.step_message_with_label(benchmark.b_skip, msg)
}
// total_message returns a string with total summary of the benchmark run.
pub fn (b &Benchmark) total_message(msg string) string {
the_label := term.colorize(term.gray, msg)
mut tmsg := '${term.colorize(term.bold, 'Summary for $the_label:')} '
if b.nfail > 0 {
tmsg += term.colorize(term.bold, term.colorize(term.red, '$b.nfail failed')) + ', '
}
if b.nok > 0 {
tmsg += term.colorize(term.bold, term.colorize(term.green, '$b.nok passed')) + ', '
}
if b.nskip > 0 {
tmsg += term.colorize(term.bold, term.colorize(term.yellow, '$b.nskip skipped')) + ', '
}
tmsg += '$b.ntotal total. ${term.colorize(term.bold, 'Runtime:')} ${b.bench_timer.elapsed().microseconds() / 1000} ms.\n'
return tmsg
}
// total_duration returns the duration in ms.
pub fn (b &Benchmark) total_duration() i64 {
return b.bench_timer.elapsed().milliseconds()
}
// tdiff_in_ms prefixes `s` with a time difference calculation.
fn (b &Benchmark) tdiff_in_ms(s string, tdiff i64) string {
if b.verbose {
return '${f64(tdiff) / 1000.0:9.3f} ms $s'
}
return s
}