D log parse script - slow

import std.stdio;
import std.string;
import std.array;
import std.algorithm : splitter;
import std.typecons : tuple, Tuple;
import std.conv : to;

void read_log(string filename) {
    File file = File(filename, "r");
    Tuple!(char[], int, char[])[] npushed;
    Tuple!(int, char[], int, bool, bool)[] pushed;
    foreach (line; file.byLine) {
        if (line.indexOf("SOC_NOT_PUSHED") != -1) {
            auto tarr = line.split();
            npushed ~= tuple(tarr[2] ~ tarr[3], to!int(tarr[$ - 1]), tarr[$ - 2]);
            continue;
        }
        if (line.indexOf("SYNC_PUSH:") != -1) {
            auto rel = line.split("SYNC_PUSH:")[1].strip();
            auto att = rel.split(" at ");
            auto ina = att[1].split(" in ");
            auto msa = ina[1].split(" ms ");
            pushed ~= tuple(to!int(att[0]), ina[0], to!int(msa[0]),
                    msa[1].indexOf("PA-SOC_POP") != -1, msa[1].indexOf("CU-SOC_POP") != -1);
        }
    }
    // Doing more stuff with these arrays later. For now, just printing lengths
    writeln(npushed.length);
    writeln(pushed.length);
}