Hello,
I'm wondering the difference between the overhead of using homogeneous
tuple and array, for example:
var TupleVar: 8*real;
var ArrayVar: [1..8] real;
1. Are they both allocated on memory in a row-major behavior ? (Index order
makes big difference ?)
2. I played a little bit on both with a toy program:
var stt = getCurrentTime();
for i in 1..8 {
for j in 1..12345678 {
tmp = j/101 + 3.14/j;
tupleVar[i] += tmp;
}
}
var ent = getCurrentTime();
writeln("Total Time of tuple: ", ent-stt);
stt = getCurrentTime();
for i in 1..8 {
for j in 1..12345678 {
tmp = j/101 + 3.14/j;
arrayVar[i] += tmp;
}
}
ent = getCurrentTime();
writeln("Total Time of array: ", ent-stt);
The time for tuple is about 2.25 seconds, while the time for array is
about 4.8 seconds, more than twice of the one tuple one, kinda superised
me, I want to know why.
Thank you !
--
Best regards
Hui Zhang
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