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Why is “except: pass” a bad programming practice?
...The main problem here is that it ignores all and any error: Out of memory, CPU is burning, user wants to stop, program wants to exit, Jabberwocky is killing users.
This is way too much. In your head, you're thinking "I want to ignore this network error". If something unexpected goes wrong, then you...
Why should I not include cpp files and instead use a header?
...ng with a tiny tiny little program, and a nice and relatively unencumbered CPU to compile it for you. You won't always be so lucky.
If you ever delve into the realms of serious computer programming, you'll be seeing projects with line counts that can reach millions, rather than dozens. That's a l...
How to use WeakReference in Java and Android development?
...ay well when in use. Of note, NetBeans can be brought to an effective 100% CPU stop by this.
– Tom Hawtin - tackline
Jul 14 '10 at 9:22
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What's the best way to get the last element of an array without deleting it?
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@DavidMurdoch Perhaps, but it sure does churn the RAM and CPU, creating the temp array for the array values...
– Theodore R. Smith
May 5 '12 at 2:46
13
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Fastest hash for non-cryptographic uses?
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if you have the benefit/luxury of a newer Intel cpu, there is a crc32c assembly command that is...probably really fast (though isn't the traditional crc32 value). See also xxhash code.google.com/p/xxhash
– rogerdpack
Dec 2 '13 at 20:...
Comparison of Android networking libraries: OkHTTP, Retrofit, and Volley [closed]
...ess your data using ByteString and Buffer to do some clever things to save CPU and memory. (FYI: This reminds me of the Koush's OIN library with NIO support!)
We can use Retrofit together with RxJava to combine and chain REST calls using rxObservables to avoid ugly callback chains (to avoid callback...
Lock, mutex, semaphore… what's the difference?
...r of threads to enter, this can be used for example to limit the number of cpu, io or ram intensive tasks running at the same time.
For a more detailed post about the differences between mutex and semaphore read here.
You also have read/write locks that allows either unlimited number of readers or...
Java 8 Streams: multiple filters vs. complex condition
...arge array 1,000,000 elements throughput ops/s:
NOTE: tests runs on
8 CPU
1 GB RAM
OS version: 16.04.1 LTS (Xenial Xerus)
java version: 1.8.0_121
jvm: -XX:+UseG1GC -server -Xmx1024m -Xms1024m
UPDATE:
Java 11 has some progress on the performance, but the dynamics stay the same
Benchmark mo...
How to pass objects to functions in C++?
...fying its value while the function is being executed.
The downside is the CPU cycles and extra memory spent to copy the object.
Pass by const reference:
void func (const vector& v);
This form emulates pass-by-value behavior while removing the copying overhead. The function gets read access ...
How is Docker different from a virtual machine?
...ualization work at a low level?
In this case the VM manager takes over the CPU ring 0 (or the "root mode" in newer CPUs) and intercepts all privileged calls made by the guest OS to create the illusion that the guest OS has its own hardware. Fun fact: Before 1998 it was thought to be impossible to ac...