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Why do people say that Ruby is slow? [closed]

I like Ruby on Rails and I use it for all my web development projects. A few years ago there was a lot of talk about Rails being a memory hog and about how it didn't scale very well but these suggestions were put to bed by Gregg Pollack here. ...
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Why do we use Base64?

... Your first mistake is thinking that ASCII encoding and Base64 encoding are interchangeable. They are not. They are used for different purposes. When you encode text in ASCII, you start with a text string and convert it to a sequence of bytes. When you encode data in Base64,...
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What is the advantage of using REST instead of non-REST HTTP?

...dy really agrees on what REST is. The wikipedia page is heavy on buzzwords and light on explanation. The discussion page is worth a skim just to see how much people disagree on this. As far as I can tell however, REST means this: Instead of having randomly named setter and getter URLs and using GET...
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What is the “FS”/“GS” register intended for?

So I know what the following registers and their uses are supposed to be: 5 Answers 5 ...
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What does the `forall` keyword in Haskell/GHC do?

I'm beginning to understand how the forall keyword is used in so-called "existential types" like this: 8 Answers ...
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Technically, why are processes in Erlang more efficient than OS threads?

...er to switch context, because they only switch at known, controlled points and therefore don't have to save the entire CPU state (normal, SSE and FPU registers, address space mapping, etc.). Erlang processes use dynamically allocated stacks, which start very small and grow as necessary. This permits...
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Is JavaScript guaranteed to be single-threaded?

...aded in all modern browser implementations, but is that specified in any standard or is it just by tradition? Is it totally safe to assume that JavaScript is always single-threaded? ...
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Regular expression to check if password is “8 characters including 1 uppercase letter, 1 special cha

... The regular expression you are after will most likely be huge and a nightmare to maintain especially for people who are not that familiar with regular expressions. I think it would be easier to break your regex down and do it one bit at a time. It might take a bit more to do, but I am ...
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What is the difference between Amazon S3 and Amazon EC2 instance?

I need to create a web application using php mysql and html. The no.of requests and data will be very high. I need Amazon server space. ...
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How to handle :java.util.concurrent.TimeoutException: android.os.BinderProxy.finalize() timed out af

...mber of TimeoutExceptions in GcWatcher.finalize, BinderProxy.finalize , and PlainSocketImpl.finalize . 90+% of them happen on Android 4.3. We're getting reports of this from Crittercism from users out in the field. ...