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Why does MYSQL higher LIMIT offset slow the query down?

... SELECT * FROM large WHERE id > 10000 ORDER BY id LIMIT 30 would be fast(er), and would return the same results provided that there are no missing ids (i.e. gaps). share | improve this answer...
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How do I pass variables and data from PHP to JavaScript?

...Script in a sense that there is no PHP directly in the JavaScript. Pros Fast - DOM operations are often quick, and you can store and access a lot of data relatively quickly. Cons Potentially Unsemantic Markup - Usually, what happens is that you use some sort of <input type=hidden> to st...
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How to write DataFrame to postgres table?

... Faster option: The following code will copy your Pandas DF to postgres DB much faster than df.to_sql method and you won't need any intermediate csv file to store the df. Create an engine based on your DB specifications. C...
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Fastest hash for non-cryptographic uses?

... CRC32 is pretty fast and there's a function for it: http://www.php.net/manual/en/function.crc32.php But you should be aware that CRC32 will have more collisions than MD5 or even SHA-1 hashes, simply because of the reduced length (32 bits co...
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How do I check if a given string is a legal/valid file name under Windows?

...ummary> /// The set of invalid filename characters, kept sorted for fast binary search /// </summary> private readonly static char[] invalidFilenameChars; /// <summary> /// The set of invalid path characters, kept sorted for fast binary search /// </summary&...
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Hashset vs Treeset

... HashSet is much faster than TreeSet (constant-time versus log-time for most operations like add, remove and contains) but offers no ordering guarantees like TreeSet. HashSet the class offers constant time performance for the basic operati...
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In C#, how can I create a TextReader object from a string (without writing to disk)

I'm using A Fast CSV Reader to parse some pasted text into a webpage. The Fast CSV reader requires a TextReader object, and all I have is a string. What's the best way to convert a string into a TextReader object on the fly? ...
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Why can tuples contain mutable items?

...s question, we have to think about the purpose tuples serve: they serve as fast, general-purpose sequences. With that in mind, it becomes quite obvious why tuples are immutable but can contain mutable objects. To wit: Tuples are fast and memory efficient: Tuples are faster to create than lists bec...
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Generate a Hash from string in Javascript

...Java. The hash << 5 - hash is the same as hash * 31 + char but a LOT faster. It's nice because it's so fast, and 31 is a small prime. Win win there. – corsiKa Sep 30 '11 at 21:59 ...
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How do the major C# DI/IoC frameworks compare? [closed]

...toFac LightCore (site is German) LinFu Ninject Petite Simple Injector (the fastest of all contestants) Spring.NET StructureMap Unity Windsor Hiro Here is a quick summary from the post: Conclusion Ninject is definitely the slowest container. MEF, LinFu and Spring.NET are faster than Ninject, but st...