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How to parse JSON in Java
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quick-json parser is very straightforward, flexible, very fast and customizable. Try it
Features:
Compliant with JSON specification (RFC4627)
High-Performance JSON parser
Supports Flexible/Configurable parsing approach
Configurable validation of key/value pairs of any JSON Hie...
PostgreSQL: Modify OWNER on all tables simultaneously in PostgreSQL
...archives.postgresql.org/pgsql-bugs/2007-10/msg00234.php is also a nice and fast solution, and works for multiple schemas in one database:
Tables
SELECT 'ALTER TABLE '|| schemaname || '.' || tablename ||' OWNER TO my_new_owner;'
FROM pg_tables WHERE NOT schemaname IN ('pg_catalog', 'information_sch...
Length of an integer in Python
...ethod took only 7.486343383789062e-05 seconds, approximately 1501388 times faster!
– FadedCoder
Mar 19 '17 at 16:30
1
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JQuery find first parent element with specific class prefix
... This selector takes an absurd amount of cycles (but it still can be fast). If you need to support IE6,IE7, or IE8, this can really screw you if your DOM grows too large; IE throws up the "script is not responding" dialog when a certain number of JS VM instructions are executed, and NOT after ...
How do I determine whether an array contains a particular value in Java?
...fficient to evaluate this condition only once, and we can use a simplified/faster condition inside the for loop based on the result. The improved contains() method:
public static <T> boolean contains2(final T[] array, final T v) {
if (v == null) {
for (final T e : array)
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How to remove items from a list while iterating?
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Can you make it faster if you know only a few will be deleted, i.e., only delete those and leave the others in-place rather than re-writing them?
– highBandWidth
Apr 20 '11 at 19:25
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Entity Framework vs LINQ to SQL
...nted approach make it really easy and convinient to use, can be coded very fast, managed. For me, just the best way to acces data.
– Antoine Pelletier
Nov 26 '15 at 18:46
10
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What uses are there for “placement new”?
...tion when you need to construct multiple instances of an object, and it is faster not to re-allocate memory each time you need a new instance. Instead, it might be more efficient to perform a single allocation for a chunk of memory that can hold multiple objects, even though you don't want to use a...
Pythonic way to check if a list is sorted or not
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@aaronasterling: operator.le should be faster than the lambda
– Marian
Oct 23 '12 at 19:47
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Is asynchronous jdbc call possible?
... your database load. Normally the response from a database comes back very fast, and an executor service backed with a fixed thread pool is a good enough solution. If you have too many long-running queries, you should consider upfront (pre-)processing - like nightly recalculation of the data or some...