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Why does MYSQL higher LIMIT offset slow the query down?
... FROM mytable
ORDER BY
id
LIMIT 10000, 30
) q
JOIN mytable t
ON t.id = q.id
See this article:
MySQL ORDER BY / LIMIT performance: late row lookups
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...
Combine multiple Collections into a single logical Collection?
... }
@Override
public int size() {
int ct = 0;
for (final Collection<? extends E> coll : items) {
ct += coll.size();
}
return ct;
}
@Override
public Object[] toArray() {
thro...
How do you save/store objects in SharedPreferences on Android?
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20 Answers
20
Active
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What is a faster alternative to Python's http.server (or SimpleHTTPServer)?
..., otherwise ./.
Options are [defaults]:
-p The port number to listen on [8080]
-a The host address to bind to [localhost]
-i Display directory index pages [True]
-s or --silent Silent mode won't log to the console
-h or --help Displays help message and exits
So to serve the current directory on po...
Why doesn't Java support unsigned ints?
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edited Oct 6 '13 at 17:40
Erik Kaplun
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answer...
How to avoid the need to specify the WSDL location in a CXF or JAX-WS generated webservice client?
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210
I finally figured out the right answer to this question today.
<plugin>
<groupId&g...
How to saveHTML of DOMDocument without HTML wrapper?
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answered Mar 18 '14 at 20:58
Alessandro VendruscoloAlessandro Vendruscolo
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Is there a regular expression to detect a valid regular expression?
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halfer
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answered Oct 5 '08 at 17:15
Markus JarderotMark...
How to set a Django model field's default value to a function call / callable (e.g., a date relative
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edited Mar 31 '17 at 6:01
waterproof
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answered...