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What does “Document-oriented” vs. Key-Value mean when talking about MongoDB vs Cassandra?
...s are opaque, the store doesn't know anything about them. This allows very fast read and write operations (a simple disk access) and I see this model as a kind of non volatile cache (i.e. well suited if you need fast accesses by key to long-lived data).
A document-oriented database extends the prev...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...re root I've noticed something odd: using the SSE scalar operations, it is faster to take a reciprocal square root and multiply it to get the sqrt, than it is to use the native sqrt opcode!
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Fastest way to flatten / un-flatten nested JSON objects
...return accumulator;
}
}(Array.isArray, Object));
Performance:
It's faster than the current solution in Opera. The current solution is 26% slower in Opera.
It's faster than the current solution in Firefox. The current solution is 9% slower in Firefox.
It's faster than the current solution in ...
PreparedStatement IN clause alternatives?
...,?,?) and execute it. Requires one prepared statement per size-of-IN-list. Fast and obvious.
Prepare SELECT my_column FROM my_table WHERE search_column = ? ; SELECT my_column FROM my_table WHERE search_column = ? ; ... and execute it. [Or use UNION ALL in place of those semicolons. --ed] Requires on...
What is the difference between “int” and “uint” / “long” and “ulong”?
...isn't anything. It's a notional value of a standard integer; assumed to be fast for purposes of things like iteration. It doesn't have a preset size.
So, the answers are correct with respect to the differences between int and uint, but are incorrect when they talk about "how large they are" or what ...
Different floating point result with optimization enabled - compiler bug?
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Different compilers have different optimization settings. Some of those faster optimization settings do not maintain strict floating-point rules according to IEEE 754. Visual Studio has a specific setting, /fp:strict, /fp:precise, /fp:fast, where /fp:fast violates the standard on what can be don...
What are the pros and cons of performing calculations in sql vs. in your application
...s functions. The app hands over parameters and gets the datasets it needs. Fast, clean, simple (for the app developer), I/O reduced to a minimum ... a shiny necklace with a low carbon footprint.
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MemoryCache does not obey memory limits in configuration
...h 60 seconds
};
Set the value of "PollingInterval" based on how fast the cache is growing , if it grow too fast increase the frequency of polling checks otherwise keep the checks not very frequent to not cause overhead.
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UDP vs TCP, how much faster is it? [closed]
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UDP is faster than TCP, and the simple reason is because its non-existent acknowledge packet (ACK) that permits a continuous packet stream, instead of TCP that acknowledges a set of packets, calculated by using the TCP window size a...
What is the difference between NaN and None?
... basically disables all efficiency in numpy.
So repeat 3 times fast: object==bad, float==good
Saying that, many operations may still work just as well with None vs NaN (but perhaps are not supported i.e. they may sometimes give surprising results):
In [15]: s_bad.sum()
Out[15]: 1
...