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Why can't enum's constructor access static fields?
...e problem solved via a nested class. Pros: it's shorter and also better by CPU consumption. Cons: one more class in JVM memory.
enum Day {
private static final class Helper {
static Map<String,Day> ABBR_TO_ENUM = new HashMap<>();
}
Day(String abbr) {
this.a...
parseInt vs unary plus, when to use which?
...arseInt beats unary plus on iOS :) This is helpful for web apps with heavy CPU consumption only. As a rule-of-thumb I'd suggest JS opt-guys to consider any JS operator over another one from the mobile performance point of view nowadays.
So, go mobile-first ;)
...
How do I declare a 2d array in C++ using new?
...
array[ index( x, y )]
Sad, I know. But you'll get used to it. And your CPU will thank you.
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How does this milw0rm heap spraying exploit work?
...e chunk, the probability of jumping there is high). When we jump there the CPU will keep executing or cl, [edx] instructions until in reaches the beginning of shellcode that's put in memory.
I've disassembled the shellcode:
00000000 C9 leave
00000001 2B1F sub ebx,[edi...
Add native files from NuGet package to project output directory
...ctory. So to add an x86 and x64 version of a native library used by an Any CPU managed assembly you would end up with a directory structure similar to the following:
build
x86
NativeLib.dll
NativeLibDependency.dll
x64
NativeLib.dll
NativeLibDependency.dll
MyNugetPackageID.targets
lib
ne...
multiprocessing: sharing a large read-only object between processes?
... the time that
Process.start() was called.
Example
On Windows (single CPU):
#!/usr/bin/env python
import os, sys, time
from multiprocessing import Pool
x = 23000 # replace `23` due to small integers share representation
z = [] # integers are immutable, let's try mutable object
def printx(...
Why is arr = [] faster than arr = new Array?
..., the VM knows we want an array; with new Array, the VM needs to use extra CPU cycles to figure out what new Array actually does.
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Building and running app via Gradle and Android Studio is slower than via Eclipse
...ject with gradle files and indexing tasks). Measure build time and process CPU with and without antivirus enabled to see if it is related.
Profiling a build
Gradle has built-in support for profiling projects. Different projects are using a different combination of plugins and custom scripts. Usin...
When should I use Lazy?
... I believe the main trade-off is between memory usage (lazy) and cpu usage (not-lazy). Because lazy has to do some extra book-keeping, InitLazy would use more memory than the other solutions. It also might have a minor performance hit on each access, while it checks whether it already has ...
What is the meaning and difference between subject, user and principal?
...r's intent to a reader. When programming we have the luxury/curse that the CPU will interpret our instructions in only one way and we are forced to use it's level of precision. But in human language we need nuance and precision to convey meaning efficiently.
– T.Rob
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