std.algorithm issue

[bearophile]

More versions with more surprises:

    t = clock();
    for (uint i; i < 100U; ++i)
        r = Map2!((int x) {return -x;})(data);
    putr("Map2 with locally defined delegate: ", clock() - t, " ", r[$-1]);

    t = clock();
    for (uint i; i < 100U; ++i)
        r = Map2!(function(int x) {return -x;})(data);
    putr("Map2 with locally defined function: ", clock() - t, " ", r[$-1]);
}

/*

Timings:
    inline: 4.61 -5999999
    map global func: 4.968 -5999999
    map locally defined delegate: 4.782 -5999999
    map locally defined function: 4.328 -5999999
    Map2 with global function: 4 -5999999
    inline C malloc: 2.015
    Map3 with global function: 2.531 -5999999
    Map4 with global function: 1.969
    Map2 with locally defined delegate: 4.297 -5999999
    Map2 with locally defined function: 4.156 -5999999