Comment on Explain yourselves, comp sci.
Fosheze@lemmy.world 6 months agoIt’s a dynamically-sized list of objects of the same type stored contiguously in memory.
dynamically-sized: The size of it can change as needed.
list: It stores multiple things together.
object: A bit of programmer defined data with.
of the same type: all the objects in the list are the same kind of object
stored contigiously in memory: if you think of memory as a bookshelf then all the objects on the list would be stored right next to each other on the bookshelf rather than spread across the bookshelf.
kbotc@lemmy.world 6 months ago
Dynamically sized but stored contiguously makes the systems performance engineer in me weep. If the lists get big, the kernel is going to do so much churn.
Killing_Spark@feddit.de 6 months ago
Contiguous storage is very fast in terms of iteration though often offsetting the cost of allocation
Slotos@feddit.nl 6 months ago
Modern CPUs are also extremely efficient at dealing with contiguous data structures. Branch prediction and caching get to shine on them.
Avoiding memory access or helping CPU access it all upfront switches physical domain of computation.
IAmVeraGoodAtThis@lemmy.blahaj.zone 6 months ago
Which is why you should:
Vec
doubles in size every time it runs out of space)yetiftw@lemmy.world 6 months ago
matlab likes to pick the smallest available spot in memory to store a list, so for loops that increase the size of a matrix it’s recommended to preallocate the space using a matrix full of zeros!
tamal3@lemmy.world 6 months ago
Is that churn or chum? (RN or M)
Khanzarate@lemmy.world 6 months ago
Churm