main.d

import std.datetime;
import std.conv : to;
import vibe.d;

void main()
{
    setLogLevel(LogLevel.info);
    int count = 50_000;

    float[] msecs;
    msecs.length = count;

    StopWatch sw;

    auto settings = new HTTPClientSettings();
    //settings.defaultKeepAliveTimeout = 0.msecs();

    foreach(i; 0 .. count)
    {
        auto startTime = Clock.currAppTick();
        logInfo("======== %s [%s] starting...", getTime(startTime), i);

        sw.start();
        requestHTTP("http://127.0.0.1:8090/file.txt",
            (scope res) {

            },
            (scope res) {
                res.bodyReader.readAll();
            },
            settings,
        );
        auto endTime = Clock.currAppTick();
        msecs[i] = sw.peek().to!("msecs", float);
        logInfo("======== %s [%s] done, round time = %s", getTime(endTime), i, getTime(endTime - startTime));
    }

    auto min = float.max;
    auto max = float.min_normal;
    auto sum = 0.0;

    foreach (v; msecs)
    {
        if (v < min) min = v;
        if (v > max) max = v;
        sum += v;
    }

    import std.stdio : writefln;
    writefln("min : %07.2f  ms", min);
    writefln("max : %07.2f  ms", max);
    writefln("sum : %07.2f  ms", sum);
    writefln("mean: %07.2f  ms", sum / msecs.length);
    writefln("rps : %07.1f rps", count * 1000.0 / sum);
}

string getTime(TickDuration tick)
{
    return format("%0.3f", tick.to!("msecs", float));
}