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Faster s3 bucket duplication

...non-concurrent sync based on file modified time, size, etc. It was blazing fast when I tried it. I believe the objects are copied directly on S3 without downloading them to the local machine. It doesn't run in parallel by default but I'm sure you could have multiple sync commands running on separate...
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Fastest way to determine if an integer's square root is an integer

I'm looking for the fastest way to determine if a long value is a perfect square (i.e. its square root is another integer): ...
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How to optimize for-comprehensions and loops in Scala?

So Scala is supposed to be as fast as Java. I'm revisiting some Project Euler problems in Scala that I originally tackled in Java. Specifically Problem 5: "What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?" ...
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C# Thread safe fast(est) counter

...if all you want to do is increment a variable, Interlock.Increment will be faster. Review all of the Interlocked methods to see the various atomic operations available and to find those that suit your needs. Use lock() when you want to do more complex things like multiple inter-related increments/d...
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Using arrays or std::vectors in C++, what's the performance gap?

... a C array instead of a vector (or whatever) just because you believe it's faster as it is supposed to be lower-level. You would be wrong. Use by default vector (or the safe container adapted to your need), and then if your profiler says it is a problem, see if you can optimize it, either by using a...
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Why do people say that Ruby is slow? [closed]

...uby programmer if you want to deal with this "slowness"? Switch to a faster language. But that carries a cost. It is a cost that may be worth it. But for most web applications, language choice is not a relevant factor because there is just not enough traffic justify using a faster language tha...
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Running PostgreSQL in memory only

... or by using Runtime.exec(). But note that initdb is not something that is fast. You will definitely not want to run that for each test. You might get away running this before your test-suite though. However while this can be done, I'd recommend to have a dedicated Postgres installation where you ...
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When should I use Struct vs. OpenStruct?

...w(:name => "User", :age => 21) end end x.report 'OpenStruct fast' do REP.times do |index| OpenStruct.new(HASH) end end x.report 'Struct slow' do REP.times do |index| User.new("User", 21) end end x.report 'Struct fast' do REP.times do |index|...
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How is AngularJS different from jQuery

... functions (which is, as already mentioned, great for DOM manipulation and fast-effect achievement), while AngularJS is a real framework which gives the developer the ability to build an enterprise web-application with a lot of data-binding and exchange within a superbly organized-routing and manage...
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Favorite (Clever) Defensive Programming Best Practices [closed]

...d against. As WikiKnowledge Wrote: Avoid Defensive Programming, Fail Fast Instead. By defensive programming I mean the habit of writing code that attempts to compensate for some failure in the data, of writing code that assumes that callers might provide data that doesn't confo...