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How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
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answered Sep 20 '08 at 23:09
1800 INFORMATION1800 INFORMATION
115k2828 gold badges147147 silver badges230230 bronze badges
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Most efficient way to make the first character of a String lower case?
... Mode Cnt Score Error Units
MyBenchmark.test1 thrpt 20 10463220.493 ± 288805.068 ops/s
MyBenchmark.test2 thrpt 20 14730158.709 ± 530444.444 ops/s
MyBenchmark.test3 thrpt 20 16079551.751 ± 56884.357 ops/s
MyBenchmark.test4 thrpt 20 9762578.446 ± 584316.582...
Dealing with commas in a CSV file
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answered Apr 20 '09 at 19:14
harpoharpo
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Multiple types were found that match the controller named 'Home'
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answered Oct 20 '11 at 21:17
Darin DimitrovDarin Dimitrov
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Java URL encoding of query string parameters
... "UTF-8".
Note that spaces in query parameters are represented by +, not %20, which is legitimately valid. The %20 is usually to be used to represent spaces in URI itself (the part before the URI-query string separator character ?), not in query string (the part after ?).
Also note that there are t...
How to use classes from .jar files?
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answered Jan 20 '09 at 7:39
Adeel AnsariAdeel Ansari
37.4k1212 gold badges8787 silver badges127127 bronze badges
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generate days from date range
...ct 7 union all select 8 union all select 9) as d
) a
where a.Date between '2010-01-20' and '2010-01-24'
Output:
Date
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2010-01-24
2010-01-23
2010-01-22
2010-01-21
2010-01-20
Notes on Performance
Testing it out here, the performance is surprisingly good: the above query takes 0.0009 s...
PostgreSQL: Difference between text and varchar (character varying)
...h array).
Check this article from Depesz: http://www.depesz.com/index.php/2010/03/02/charx-vs-varcharx-vs-varchar-vs-text/
A couple of highlights:
To sum it all up:
char(n) – takes too much space when dealing with values shorter than n (pads them to n), and can lead to subtle errors ...
Why are elementwise additions much faster in separate loops than in a combined loop?
...482 Harpertown @ 3.2 GHz:
#define ALLOCATE_SEPERATE
#define ONE_LOOP
00600020
006D0020
007A0020
00870020
seconds = 6.206
#define ALLOCATE_SEPERATE
//#define ONE_LOOP
005E0020
006B0020
00780020
00850020
seconds = 2.116
//#define ALLOCATE_SEPERATE
#define ONE_LOOP
00570020
00633520
006F6A20
007B9F20...
Set object property using reflection
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edited May 9 '17 at 20:22
jpaugh
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answered ...