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C# 'is' operator performance
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@Binary Worrier- Your new operator allocations of classes are going to completely overshadow any performance differences in the 'is' operations. Why don't you remove those new operations, by reusing two different pre-allocated instances, and then re-run the co...
Is it safe to remove selected keys from map within a range loop?
... a constant for the value 0)
What the map appears to actually be doing is allocating a set number of buckets depending on the size of the map, which grows as you perform inserts at the rate of 2^B (from this source code):
byte *buckets; // array of 2^B Buckets. may be nil if count==0.
So ...
The difference between fork(), vfork(), exec() and clone()
...rk() system call does not include the creation of a new address space (the allocation and setting up of new page directories).
clone() - creates a new child process. Various parameters of this system call, specify which parts of the parent process must be copied into the child process and which part...
In Matlab, when is it optimal to use bsxfun?
...ssor cache - bsxfun doesn't get as bad of a jump, because it only needs to allocate the output array.
Below you find the code I used for timing:
n = 300;
k=1; %# k=100 for the second graph
a = ones(10,1);
rr = zeros(n,1);
bb=zeros(n,1);
ntt=100;
tt=zeros(ntt,1);
for i=1:n;
r = rand(1,i*k);
f...
Why are only a few video games written in Java? [closed]
...unacceptable to have the game freeze for 10 seconds while it scans all the allocated memory to see what can be freed. I know Java tends to choke quite a bit in GC'ing when it's close to running out of memory (and for some games out there, it will).
You're also a bit more restricted in what you can ...
How many threads is too many?
...hread pool each time it receives a request. It is up to the thread pool to allocate a thread for the task when there is one available.
– GEOCHET
Jan 27 '09 at 1:41
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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...creating replication oplog of size: 990MB...
Sun Dec 29 20:26:13.849 [FileAllocator] allocating new datafile /data/mongodbtest/replset/data/local.1, filling with zeroes...
Sun Dec 29 20:26:13.862 [FileAllocator] done allocating datafile /data/mongodbtest/replset/data/local.1, size: 1024MB, took 0...
Is there any advantage of using map over unordered_map in case of trivial keys?
... vs list) , the default process heap (talking Windows here) is serialized. Allocating (small) blocks in large quantities in a multithreaded application is very expensive.
– ROAR
Feb 4 '10 at 3:06
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C# vs C - Big performance difference
...cation (both in release build). Since the C# application is very basic and allocates the memory used in the loop on the stack and not on the heap, it is actually performing a lot better than a real application involved in objects, heavy computations and with larger data-sets. So the figures provided...
C pointers : pointing to an array of fixed size
...sing technique is the dominance of naive approach to typing of dynamically allocated arrays. For example, if the program calls for fixed arrays of type char[10] (as in your example), an average developer will malloc such arrays as
char *p = malloc(10 * sizeof *p);
This array cannot be passed to a...