prosperon/scripts/profile.js

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var t_units = ["ns", "us", "ms", "s", "ks", "Ms"];
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profile.cpu = function(fn, times = 1, q = "unnamed") {
var start = profile.now();
for (var i = 0; i < times; i++)
fn();
var elapsed = profile.now() - start;
var avgt = profile.best_t(elapsed/times);
var totalt = profile.best_t(elapsed);
say(`profile [${q}]: ${profile.best_t(avgt)} average [${profile.best_t(totalt)} for ${times} loops]`);
}
profile.ms = function(t) { return t/1000000; }
profile.secs = function(t) { return t/1000000000; }
var callgraph = {};
var st = profile.now();
function add_callgraph(fn, line, time) {
var cc = callgraph[line];
if (!cc) {
var cc = {};
callgraph[line] = cc;
cc.time = 0;
cc.hits = 0;
cc.fn = fn;
cc.line = line;
}
cc.time += time;
cc.hits++;
}
var hittar = 500;
var hitpct = 0.2;
var start_gather = profile.now();
if (profile.enabled)
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profile.gather(hittar, function() {
var time = profile.now()-st;
var err = new Error();
var stack = err.stack.split("\n");
stack = stack.slice(1);
stack = stack.map(x => x.slice(7).split(' '));
var fns = stack.map(x => x[0]).filter(x=>x);
var lines = stack.map(x => x[1]).filter(x => x);
lines = lines.map(x => x.slice(1,x.length-1));
for (var i = 0; i < fns.length; i++)
add_callgraph(fns[i], lines[i], time);
st = profile.now();
profile.gather_rate(Math.variate(hittar,hitpct));
});
var filecache = {};
function get_line(file, line) {
var text = filecache[file];
if (!text) {
var f = io.slurp(file);
if (!f) {
filecache[file] = "undefined";
return filecache[file];
}
filecache[file] = io.slurp(file).split('\n');
text = filecache[file];
}
if (typeof text === 'string') return text;
text = text[Number(line)-1];
if (!text) return "NULL";
return text.trim();
}
profile.print_cpu_instr = function()
{
say("===CPU INSTRUMENTATION===\n");
var gather_time = profile.now()-start_gather;
var e = Object.values(callgraph);
e = e.sort((a,b) => {
if (a.time > b.time) return -1;
return 1;
});
e.forEach(x => {
var ffs = x.line.split(':');
var time = profile.best_t(x.time);
var pct = x.time/gather_time*100;
say(`${x.line}::${x.fn}:: ${time} (${pct.toPrecision(3)}%) (${x.hits} hits) --> ${get_line(ffs[0], ffs[1])}`);
});
}
profile.best_t = function (t) {
var qq = 0;
while (t > 1000 && qq < t_units.length-1) {
t /= 1000;
qq++;
}
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return `${t.toPrecision(4)} ${t_units[qq]}`;
};
profile.report = function (start, msg = "[undefined report]") { console.info(`${msg} in ${profile.best_t(profile.now() - start)}`); };
var profile_frames = {};
var profile_frame_ts = [];
var profile_cframe = profile_frames;
var profile_frame = 0;
profile.frame = function(title)
{
profile_frame_ts.push(profile_cframe);
profile_cframe[title] ??= {};
profile_cframe = profile_cframe[title];
profile_cframe._times ??= [];
profile_cframe._times[profile_frame] = profile.now();
}
profile.endframe = function()
{
if (profile_cframe === profile_frames) return;
profile_cframe._times[profile_frame] = profile.now() - profile_cframe._times[profile_frame];
profile_cframe = profile_frame_ts.pop();
if (profile_cframe === profile_frames) profile_frame++;
}
var print_frame = function(frame, indent, title)
{
var avg = frame._times.reduce((sum, e) => sum += e)/frame._times.length;
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say(indent + `${title} ::::: ${profile.best_t(avg)} (${frame._times.length} hits)`);
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for (var i in frame) {
if (i === '_times') continue;
print_frame(frame[i], indent + " ", i);
}
}
profile.print_frame_avg = function()
{
var indent = "";
for (var i in profile_frames)
print_frame(profile_frames[i], "", 'frame');
}
var report_cache = {};
var cachest = 0;
var cachegroup;
var cachetitle;
profile.cache = function(group, title)
{
cachest = profile.now();
cachegroup = group;
cachetitle = title;
}
profile.endcache = function(tag = "")
{
addreport(cachegroup, cachetitle + tag, cachest);
}
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profile.print_cache_report = function()
{
var str = "===START CACHE REPORTS===\n";
for (var i in report_cache)
str += printreport(report_cache[i], i) + "\n";
return str;
}
function addreport(group, line, start) {
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if (typeof group !== 'string') group = 'UNGROUPED';
report_cache[group] ??= {};
var cache = report_cache[group];
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cache[line] ??= [];
var t = profile.now();
cache[line].push(t - start);
return t;
};
function printreport(cache, name) {
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var report = `==${name}==` + "\n";
var reports = [];
for (var i in cache) {
var time = cache[i].reduce((a,b)=>a+b);
reports.push({
time:time,
name:i,
hits:cache[i].length,
avg:time/cache[i].length
});
}
reports = reports.sort((a,b) => {
if (a.avg<b.avg) return 1;
return -1;
});
for (var rep of reports)
report += `${rep.name} ${profile.best_t(rep.avg)} (${rep.hits} hits) (total ${profile.best_t(rep.time)})\n`;
return report;
};