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How can I use threading in Python?
...ses threads instead (an important distinction - use multiple processes for CPU-intensive tasks; threads for (and during) I/O):
multiprocessing.dummy replicates the API of multiprocessing, but is no more than a wrapper around the threading module.
import urllib2
from multiprocessing.dummy import Po...
What is “overhead”?
...ffer a lot with context. In general, it's resources (most often memory and CPU time) that are used, which do not contribute directly to the intended result, but are required by the technology or method that is being used. Examples:
Protocol overhead: Ethernet frames, IP packets and TCP segments al...
pycharm running way slow
...ly proper way to fix your specific performance problem is by capturing the CPU profiler snapshot as described in this document and sending it to PyCharm support team, either by submitting a ticket or directly into the issue tracker.
After the CPU snapshot is analyzed, PyCharm team will work on a fi...
What are the differences between Deferred, Promise and Future in JavaScript?
...
@MartinKällman You're right! I hadn't revisited this in a while and have learned a bit. I'll post a separate answer below, but leave this since people seem to have benefited from the usage example.
– fncomp
...
YYYY-MM-DD format date in shell script
... a more compact notation for the accepted answer.
– Håvard Geithus
Nov 16 '15 at 20:42
...
Thread context switch Vs. process context switch
...cision is made, kernel saves part of the thread context that is located in CPU (CPU registers) into the dedicated place in memory (frequently on the top of the kernel stack of outgoing thread). Then the kernel performs switch from kernel stack of outgoing thread on to kernel stack of the incoming th...
What's the best way to send a signal to all members of a process group?
...ll your own children, use pkill -TERM -P ${$}.
– François Beausoleil
Apr 10 '15 at 14:30
3
@Only...
Timer function to provide time in nano seconds using C++
...fferent issues. For example in
Windows XP, all AMD Athlon X2 dual
core CPUs return the PC of either of
the cores "randomly" (the PC sometimes
jumps a bit backwards), unless you
specially install AMD dual core driver
package to fix the issue. We haven't
noticed any other dual+ core CPUs...
Function pointers, Closures, and Lambda
...ct 16 '08 at 15:41
Jouni K. SeppänenJouni K. Seppänen
33.9k55 gold badges6767 silver badges9696 bronze badges
...
Why is processing a sorted array slower than an unsorted array?
...e accessed in memory-order. They have been allocated consecutively in RAM. CPUs love accessing memory sequentially because they can speculatively request the next cache line so it will always be present when needed.
When you are sorting the list you put it into random order because your sort keys a...