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Is a LINQ statement faster than a 'foreach' loop?
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Why should LINQ be faster? It also uses loops internally.
Most of the times, LINQ will be a bit slower because it introduces overhead. Do not use LINQ if you care much about performance. Use LINQ because you want shorter better readable and maintainable code.
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iPhone: How to get current milliseconds?
What is the best way to get the current system time milliseconds?
18 Answers
18
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GCC compile error with >2 GB of code
...ight?
If all your functions have a similar "format" (multiply n numbers m times and add the results - or something similar) then I think you can do this:
change the generator program to output offsets instead of strings (i.e. instead of the string "s.ds0" it will produce offsetof(ProcessVars, ds0...
How can I check if a string represents an int, without using try/except?
...n sickness.
Here's a quick and dirty edit of Bruno's post:
import sys, time, re
g_intRegex = re.compile(r"^([+-]?[1-9]\d*|0)$")
testvals = [
# integers
0, 1, -1, 1.0, -1.0,
'0', '0.','0.0', '1', '-1', '+1', '1.0', '-1.0', '+1.0', '06',
# non-integers
'abc 123',
1.1, -1....
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...e other are more favorable to -Os optimizations.
Here are the results for time ./test 0 0 on several processors (user time reported):
Processor (System-on-Chip) Compiler Time (-O2) Time (-Os) Fastest
AMD Opteron 8350 gcc-4.8.1 0.704s 0.896s -O2
AM...
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
...ns in C, Python, Erlang and Haskell. In order to get some higher execution times, I search for the first triangle number with more than 1000 divisors instead of 500 as stated in the original problem.
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Convert duration to hours:minutes:seconds (or similar) in Rails 3 or Ruby
...pi.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html
distance_of_time_in_words(3600)
=> "about 1 hour"
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How to write to a file, using the logging Python module?
How can I use the logging module in Python to write to a file? Every time I try to use it, it just prints out the message.
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Reverse a string in Python
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This is about 3 times slower.
– oneself
Oct 6 '17 at 15:09
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Why is reading lines from stdin much slower in C++ than Python?
...y, when an input stream is buffered, instead of reading one character at a time, the stream will be read in larger chunks. This reduces the number of system calls, which are typically relatively expensive. However, since the FILE* based stdio and iostreams often have separate implementations and t...