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Fast Linux File Count for a large number of files

...e to try to make it obvious what's going on. I wrote this and tested it on 64-bit Linux, but it should work on any POSIX-compliant system, including Microsoft Windows. Bug reports are welcome; I'm happy to update this if you can't get it working on your AIX or OS/400 or whatever. As you can see, it...
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Why should hash functions use a prime number modulus?

...mmediate address scale factor (e.g. lea eax,eax*8; leax, eax,eax*4 on x86/x64). So *31 is a good candidate for prime number multiplication. This was pretty much true some years ago - now latest CPUs architecture have an almost instant multiplication - division is always slower... ...
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How do I profile memory usage in Python?

...3 1612820 49 1612820 49 str 1 11699 24 483960 15 2096780 64 tuple 2 174 0 241584 7 2338364 72 dict of module 3 3478 7 222592 7 2560956 78 types.CodeType 4 3296 7 184576 6 2745532 84 function 5 401 1 175112 5 2920644 ...
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How does a language expand itself? [closed]

... view, a syscall is an elementary machine instruction like SYSENTER on x86-64 with some conventions (ABI) On my Linux desktop, the Qt libraries are above X11 client libraries communicating with the X11 server Xorg thru X Windows protocols. On Linux, use ldd on your executable to see the (long) lis...
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How are zlib, gzip and zip related? What do they have in common and how are they different?

...ion algorithm 8 - The file is Deflated 9 - Enhanced Deflating using Deflate64(TM) 10 - PKWARE Data Compression Library Imploding (old IBM TERSE) 11 - Reserved by PKWARE 12 - File is compressed using BZIP2 algorithm 13 - Reserved by PKWARE 14 - LZMA (EFS) 15 - Reserved by PKWARE 16 - Reserved by PKWA...
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How to pass json POST data to Web API method as an object?

...r browser console $.ajax({ type: 'POST', url: 'http://localhost:33649/api/TestApi/TestMethod', data: {'':'hello'}, contentType: 'application/x-www-form-urlencoded', dataType: 'json', success: function(data){ console.log(data) } }); Second, to perform multiple posts, It is ...
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Does MSTest have an equivalent to NUnit's TestCase?

... 64 Microsoft recently announced "MSTest V2" (see blog-article). This allows you to consistently (d...
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The JPA hashCode() / equals() dilemma

... 64 I always override equals/hashcode and implement it based on the business id. Seems the most rea...
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How to find Unused Amazon EC2 Security groups

... database. -- MySQL dump 10.13 Distrib 5.5.41, for debian-linux-gnu (x86_64) -- -- Host: localhost Database: aws_security_groups -- ------------------------------------------------------ -- Server version 5.5.40-log /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */; /*!40101 S...
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What's the difference between :: (double colon) and -> (arrow) in PHP?

... casablancacasablanca 64.3k55 gold badges121121 silver badges142142 bronze badges a...