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How do I delete a fixed number of rows with sorting in PostgreSQL?
...s recommend to use array instead of IN and subquery. This should work much faster
DELETE FROM logtable
WHERE id = any (array(SELECT id FROM logtable ORDER BY timestamp LIMIT 10));
This and some other tricks can be found here
...
Maven: The packaging for this project did not assign a file to the build artifact
... (and compile, test, etc.) and you want your build to be effective but yet fast.
Yes, you could speed up this last step at least skipping tests (compilation and execution, via -Dmaven.test.skip=true) or play with a particular profile (to skip as many plugins as possible), but it is much easier and...
What does yield mean in PHP?
...quences and live data streams.
Generators are also supposed to be pretty fast. But keep in mind that when we are talking about fast, we are usually talking in very small numbers. So before you now run off and change all your code to use generators, do a benchmark to see where it makes sense.
Anot...
When should I use Inline vs. External Javascript?
...the page more than once, cached external (even for a few lines) is clearly faster than waiting for the bytes for those few lines over the wire on the n=2+ page loads.
– jinglesthula
May 2 '18 at 17:16
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jQuery animate backgroundColor
...thing which doesn't handle Safari and crashes when the transitions are too fast. Since a minified version isn't supplied you might like test various compressors and make your own min version. YUI gets the best compression in this case needing only 2317 bytes and since it is so small - here it is:
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Git, How to reset origin/master to a commit?
...
Doesn't work. remote: error: denying non-fast-forward refs/heads/master (you should pull first)
– m0skit0
Jan 16 '15 at 10:36
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Convert string to integer type in Go?
...
Here are three ways to parse strings into integers, from fastest runtime to slowest:
strconv.ParseInt(...) fastest
strconv.Atoi(...) still very fast
fmt.Sscanf(...) not terribly fast but most flexible
Here's a benchmark that shows usage and example timing for each function:
pa...
LINQ .Any VS .Exists - What's the difference?
...n on Matas' answer on benchmarking.
TL/DR: Exists() and Any() are equally fast.
First off: Benchmarking using Stopwatch is not precise (see series0ne's answer on a different, but similiar, topic), but it is far more precise than DateTime.
The way to get really precise readings is by using Perform...
How do I detect unsigned integer multiply overflow?
...e number of bits for your target integer, of course.)
I'm not sure of the fastest way to determine the position of the highest one-bit in a number, here's a brute-force method:
size_t highestOneBitPosition(uint32_t a) {
size_t bits=0;
while (a!=0) {
++bits;
a>>=1;
...
What is the best algorithm for overriding GetHashCode?
...ike the implementation given in Josh Bloch's fabulous Effective Java. It's fast and creates a pretty good hash which is unlikely to cause collisions. Pick two different prime numbers, e.g. 17 and 23, and do:
public override int GetHashCode()
{
unchecked // Overflow is fine, just wrap
{
...