==============================Create/Addition==============================
--------------------------------------
for(i = 0; i < 99999; i++){
    array[i] = 1;
}
Delay: 2705 ms
--------------------------------------
for(i = 99999; i >= 0; i--){
    array[i] = 1;
}
Delay: 21 ms
--------------------------------------
list = ds_list_create();
for(i = 0; i < 99999; i++){
    ds_list_add(list, 1);
}
Delay: 26 ms
--------------------------------------
list = ds_list_create();
for(i = 0; i < 99999; i++){
    list[| i] = 1;
}
Delay: 1868 ms
--------------------------------------
map = ds_map_create();
for(i = 0; i < 99999; i++){
    ds_map_add(map, i, 1);
}
Delay: 127 ms
--------------------------------------
map = ds_map_create();
for(i = 0; i < 99999; i++){
    map[? i] = 1;
}
Delay: 135 ms
--------------------------------------
list = ds_list_create();
repeat(99999){
    ds_list_add(list, 1);)
}
Delay: 16 ms
--------------------------------------
==============================Replacing==============================
--------------------------------------
for(i = 0; i < 99999; i++){
    array[i] = 2;
}
Delay: 20 ms
--------------------------------------
for(i = 99999; i >= 0; i--){
    array[i] = 2;
}
Delay: 21 ms
--------------------------------------
for(i = 0; i < 99999; i++){
    ds_list_replace(list, i, 2);
}
Delay: 25 ms
--------------------------------------
for(i = 0; i < 99999; i++){
    list[| i] = 2;
}
Delay: 24 ms
--------------------------------------
for(i = 0; i < 99999; i++){
    ds_map_replace(map, i, 2);
}
Delay: 93 ms
--------------------------------------
for(i = 0; i < 99999; i++){
    map[? i] = 2;
}
Delay: 124 ms
--------------------------------------
==============================Access==============================
--------------------------------------
for(i = 0; i < 99999; i++){
    a = array[i];
}
Delay: 21 ms
--------------------------------------
for(i = 99999; i >= 0; i--){
    a = array[i];
}
Delay: 21 ms
--------------------------------------
for(i = 0; i < 99999; i++){
    a = ds_list_find_value(list, i);
}
Delay: 24 ms
--------------------------------------
for(i = 99999; i >= 0; i--){
    a = list[| i];
}
Delay: 24 ms;
--------------------------------------
for(i = 0; i < 99999; i++){
    a = ds_map_find_value(map, i)
}
Delay: 86 ms
--------------------------------------
for(i = 0; i < 99999; i++){
    a = map[? i];
}
Delay: 93 ms;
--------------------------------------



How do Performance Test:

var time, a, map;
time = current_time;
/// <--- Function goes here.
time = current_time - time;
show_debug_message("|-----------------------------");
show_debug_message("| Delay: " + string(time) + " ms");
show_debug_message("|-----------------------------");