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How much faster is Redis than mongoDB?
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Rough results from the following benchmark: 2x write, 3x read.
Here's a simple benchmark in python you can adapt to your purposes, I was looking at how well each would perform simply setting/retrieving values:
#!/usr/bin/env python2.7
im...
What is the meaning of the term arena in relation to memory?
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@AndreasHaferburg: The memory allocator from the standard library automatically has a massive advantage over custom-writing your own, namely that you don't have to write/test/debug/maintain etc. Even if you're certain with no evidence that you can improve performan...
Store output of subprocess.Popen call in a string
...process.check_output() function to store output of a command in a string:
from subprocess import check_output
out = check_output(["ntpq", "-p"])
In Python 2.4-2.6
Use the communicate method.
import subprocess
p = subprocess.Popen(["ntpq", "-p"], stdout=subprocess.PIPE)
out, err = p.communicate(...
implements Closeable or implements AutoCloseable
...y-with-resources, but also allows throwing more general checked exceptions from close().
When in doubt, use AutoCloseable, users of your class will be grateful.
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nodejs how to read keystrokes from stdin
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For those finding this answer since this capability was stripped from tty, here's how to get a raw character stream from stdin:
var stdin = process.stdin;
// without this, we would only get streams once enter is pressed
stdin.setRawMode( true );
// resume stdin in the parent process (no...
Are PHP include paths relative to the file or the calling code?
...tion of A.PHP? That is, does it matter which file the include is called from, or only what the current working directory is- and what determines the current working directory?
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How to find all the subclasses of a class given its name?
I need a working approach of getting all classes that are inherited from a base class in Python.
10 Answers
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How to highlight and color gdb output during interactive debugging?
...ithub.com/dholm/voidwalker
@dholm also provides his own .gdbinit inspired from the previous one.
pwndbg
Some projects provide a set of useful functions, including improved display. This is the case for PEDA or pwndbg. The latter gives the following description:
A PEDA replacement. In the sp...
How can I get the source code of a Python function?
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If the function is from a source file available on the filesystem, then inspect.getsource(foo) might be of help:
If foo is defined as:
def foo(arg1,arg2):
#do something with args
a = arg1 + arg2
return a
The...
Clang vs GCC - which produces faster binaries? [closed]
...25 |
The points of note here are:
Neither compiler now benefits at all from -O3 optimization.
Clang beats GCC just as importantly at each level of optimization.
GCC's performance is only marginally affected by the smart-pointer type
change.
Clang's -O2 performance is importantly affected by the...