Re: Tip of the week - Concetenation
- Posted by jaygade Oct 17, 2010
- 2097 views
Surely this could be optimized, especially with respect to literals as the examples show?
I thought that Euphoria sequences were optimized to where there was a bit of extra space allocated to the end where small concatenations and/or appends could be done without copying.
Of course, that wouldn't work too well in a loop where an arbitrary number of objects were appended to a sequence, but still.
Also, since sequences are heterogeneous, why would it do any copies at all? Each object member of the sequence is a character/atom, and the sequence contains pointers to each individual member, right? So concatenating and appending shouldn't involve copying at all, rather just adding a new pointer to the sequence?
It would only be when any existing member of a sequence is changed that a copy would have to be made.
This example really confuses me, and goes against the way that I thought that Euphoria always worked. I thought that it only made copies when necessary.
