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Why is reading lines from stdin much slower in C++ than Python?
... 17
mmap 22
stat64 30
read_nocancel 25958
Python
./a.py < in
Read 6512402 lines in 1 seconds. LPS: 6512402
syscalls sudo dtruss -c ./a.py < in
CALL ...
Get url without querystring
...
BrandonBrandon
64.2k2929 gold badges186186 silver badges217217 bronze badges
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Get Image Height and Width as integer values?
... rights on the directory but not the image itself (works with the image on 644).
– Lee Saxon
Jan 10 '16 at 16:15
1
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warning: incompatible implicit declaration of built-in function ‘xyz’
... argc, char **argv) {
exit(1);
}
Compiled like this on Fedora 17 Linux 64 bit with gcc:
el@defiant ~/foo2 $ gcc -o n n2.c
n2.c: In function ‘main’:
n2.c:2:3: warning: incompatible implicit declaration of built-in
function ‘ex...
Learning assembly [closed]
...o learn reverse engineering.
What you want to do is grab the IA-32 and AMD64 (both are covered together) architecture manuals from Intel and AMD, and look through the early sections on instructions and opcodes. Maybe read a tutorial or two on assembly language, just to get the basics of assembly la...
Build fat static library (device + simulator) using Xcode and SDK 4+
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Any idea how to make this work with XCode 5 and ARM64? If I leave architectures as standard, it makes the library with armv7, armvs7 and i386 as expected. If I set architectures to standard including 64bit, then the library only contains "cputype 16777223". I use otool -h ...
Loop code for each file in a directory [duplicate]
...Vikström
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How to compile python script to binary executable
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64
Or use PyInstaller as an alternative to py2exe. Here is a good starting point. PyInstaller also...
Why does my application spend 24% of its life doing a null check?
...reading from sequential addresses. The unit of storage for the L1 cache is 64 bytes. Or in other words, once the processor reads one byte, the next 63 are very fast since they'll be present in the cache.
Which makes an array by far the most efficient data structure. Also the reason that the .NET Li...
What exactly is a C pointer if not a memory address?
... emulate a 32-bit machine on a physical 16-bit machine and you extend your 64KB of RAM to up to 4GB by using disk storage and implement 32-bit pointers as offsets into a huge file. Those pointers aren't real memory addresses.
– Alexey Frunze
Mar 1 '13 at 9:20
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