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String concatenation: concat() vs “+” operator
...thod should be faster. However, with more strings the StringBuilder method wins, at least in terms of performance.
The source code of String and StringBuilder (and its package-private base class) is available in src.zip of the Sun JDK. You can see that you are building up a char array (resizing as ...
Does pandas iterrows have performance issues?
...ly at the start of the iteration; this savings alone is one of the biggest wins.
Better caching: Iterating over a C array is cache-friendly and thus very fast. A pandas DataFrame is a "column-oriented table", which means that each column is really just an array. So the native actions you can perform...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...iplication, where my answer has a section on why rcpps is not a throughput win anymore. (Or a latency win), and numbers on divide throughput/latency.
– Peter Cordes
Apr 25 '18 at 11:38
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How to get error message when ifstream open fails
...lying functions may not set errno at all (direct system calls on Linux, or Win32). This doesn't work on many real world implementations.
– strcat
Mar 12 '14 at 6:40
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How to get year, month, day, hours, minutes, seconds and milliseconds of the current moment in Java?
...String format2 = now.atZone(ZoneId.of("GMT")).format(DateTimeFormatter.RFC_1123_DATE_TIME);
String format3 = now.format(DateTimeFormatter.ofPattern("yyyyMMddHHmmss", Locale.ENGLISH));
System.out.println(format1);
System.out.println(format2);
System.out.println(format3);
or when you're not on Java ...
Pointers in Python?
... Alex MartelliAlex Martelli
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What is the difference between include and extend in Ruby?
...ils about include, with its default behavior, assuming you've run the following code
class Klazz
include Mod
end
If Mod is already included in Klazz, or one of its ancestors, the include statement has no effect
It also includes Mod's constants in Klazz, as long as they don't clash
It gives Kla...
Benefits of EBS vs. instance-store (and vice-versa) [closed]
...stance storage that I see are cost-savings. Otherwise EBS-backed instances win. Eric mentioned all the advantages.
[2012-07-16] I would phrase this answer a lot different today.
I haven't had any good experience with EBS-backed instances in the past year or so. The last downtimes on AWS pretty m...
What is the most efficient string concatenation method in python?
...ython (like StringBuilder in C# or StringBuffer in Java)? I found following methods here :
11 Answers
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Rich vs Anemic Domain Model [closed]
...er insight take a look at my blog https://www.link-intersystems.com/blog/2011/10/01/anemic-vs-rich-domain-models/
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