Inefficient file checks

[baryluk]

[pid 3862670] lstat("../.dub/packages/mir-algorithm/3.21.0/mir-algorithm/source/mir/bignum/fp.d", {st_mode=S_IFREG|0644, st_size=22391, ...}) = 0
[pid 3862670] lstat("../.dub/packages/mir-algorithm/3.21.0/mir-algorithm/source/mir/bignum/fp.d", {st_mode=S_IFREG|0644, st_size=22391, ...}) = 0
[pid 3862670] lstat("../.dub/packages/mir-algorithm/3.21.0/mir-algorithm/source/mir/bignum/fp.d", {st_mode=S_IFREG|0644, st_size=22391, ...}) = 0
[pid 3862670] stat("../.dub/packages/mir-algorithm/3.21.0/mir-algorithm/source/mir/bignum/fp.d", {st_mode=S_IFREG|0644, st_size=22391, ...}) = 0

This gets pretty inefficient, multiplied by number of files it is checking.

DUB version 1.35.0, built on Dec  2 2023

Linux, amd64

Input:

v2.d:

#!/usr/bin/env -S dub
/+dub.sdl:
dependency "mir-algorithm" version="~>3.6"
+/
import mir.algorithm.iteration: each;
import mir.ndslice;
import std.stdio: writeln;

void main()
{
    auto matrix = slice!double(3, 4);
    matrix[] = 0;
    matrix.diagonal[] = 1;

    auto row = matrix[2];
    row[3] = 6;
    // D & C index order
    assert(matrix[2, 3] == 6);

    matrix.byDim!0.each!writeln;
}

Run:

$ strace -f ./v2.d
...