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Shared-memory objects in multiprocessing
..._name__ == '__main__':
import timeit
N_PROC = 8
INNER_LOOP = 10000
N = 1000
def propagate(t):
i, shm_hdl, evidence = t
a = SharedNumpyMemManager.getArray(shm_hdl)
for j in range(INNER_LOOP):
a[i] = i
class Parallel_Dummy_PF:
de...
How do I determine the size of an object in Python?
...sizeof(Bar().__dict__)
280
>>> A = rand(10)
>>> B = rand(10000)
>>> asizeof.asizeof(A)
176
>>> asizeof.asizeof(B)
80096
As mentioned,
The (byte)code size of objects like classes, functions, methods, modules, etc. can be included by setting option code=True.
...
How to avoid using Select in Excel VBA
...e
Dim i As Long
Set rng = ThisWorkbook.Worksheets("SomeSheet").Range("A1:A10000")
dat = rng.Value ' dat is now array (1 to 10000, 1 to 1)
for i = LBound(dat, 1) to UBound(dat, 1)
dat(i,1) = dat(i,1) * 10 'or whatever operation you need to perform
next
rng.Value = dat ' put new values back on s...
What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
...Here's the benchmark code and here's the fiddle it's in.
var arrayCount = 10000;
var dynamicArrays = [];
for(var j=0;j<arrayCount;j++)
dynamicArrays[j] = [];
var lastLongI = 1;
for(var i=0;i<10000;i++)
{
var before = Date.now();
for(var j=0;j<arrayCount;j++)
dynamic...
Greenlet Vs. Threads
...ww.yahoo.com', 'www.ubc.ca', 'www.wikipedia.org']
URLS = []
for _ in range(10000):
for url in URLS_base:
URLS.append(url)
I had to drop out the multiprocess version as it fell before I had 500; but at 10,000 iterations:
Using gevent it took: 3.756914
-----------
Using multi-threading ...
How to find all occurrences of an element in a list?
...rting outweighs the speed gain (tested on integer lists with 100, 1000 and 10000 elements).
NOTE: A note of caution based on Chris_Rands' comment: this solution is faster than the list comprehension if the results are sufficiently sparse, but if the list has many instances of the element that is be...
How to detect scroll position of page using jQuery
...
CSS CODE
/*Scrool top btn*/
#toTop{
position: fixed;
z-index: 10000;
opacity: 0.5;
right: 5px;
bottom: 10px;
background-color: #ccc;
border: 1px solid black;
width: 40px;
height: 40px;
border-radius: 20px;
color: black;
font-size: 22px;
font-w...
Convert decimal to hexadecimal in UNIX shell script
...
Hexidecimal to decimal:
$ echo $((0xfee10000))
4276158464
Decimal to hexadecimal:
$ printf '%x\n' 26
1a
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How is the fork/join framework better than a thread pool?
...ng if the division is supposed to be that granular: it uses a threshold of 100000, which for a 1000x1000 image would produce 16 actual subtasks, each processing 62500 elements. For a 10000x10000 image there would be 1024 subtasks, which is already something.
– Joonas Pulakka
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