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Is String.Format as efficient as StringBuilder
...ence. StringBuilder and Format differ by barely 5-10%. I got variations of 20% running the tests a few times.
Milliseconds, a million iterations:
Concatenation: 367
New stringBuilder for each key: 452
Cached StringBuilder: 419
string.Format: 475
The lesson I take away is that the performance d...
What is the difference between List (of T) and Collection(of T)?
...
Tried it on my machine and list is about 20% faster. Would be interested in some discussion on why this might be. Maybe the list is better with allocating memory.
– Ray
Dec 29 '08 at 23:55
...
String formatting in Python 3
...s) # '20.45%'
"conversion rate: {:.0%}".format(self.goals / self.shots) # '20%'
"self: {!s}".format(self) # 'Player: Bob'
"self: {!r}".format(self) # '<__main__.Player instance at 0x00BF7260>'
"games: {:>3}".format(player1.games) # 'games: 123'
"games: {:>3}".format(player2.games) # ...
Transparent ARGB hex value
...% — 8C
50% — 80
45% — 73
40% — 66
35% — 59
30% — 4D
25% — 40
20% — 33
15% — 26
10% — 1A
5% — 0D
0% — 00
How is it calculated?
FF is number written in hex mode. That number represent 255 in decimal. For example, if you want 42% to calculate you need to find 42% of numbeer 2...
Position Absolute + Scrolling
...verflow: scroll;
}
.full-height{
position: absolute;
left: 0;
width: 20%;
top: 0;
height: 100%;
}
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is_file or file_exists in PHP
...ther it exists is the only important thing. So if is_dir() turns out to be 20% faster than file_exists() (which it doesn't, btw), that can be an important difference if you're only checking for dirs anyway...
– Byson
Jul 13 '15 at 11:02
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Count number of matches of a regex in Javascript
...; the advantage is limited to memory only, because on the whole it's about 20% slower than using String.match().
var re = /\s/g,
count = 0;
while (re.exec(text) !== null) {
++count;
}
return count;
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iOS UIImagePickerController result image orientation after upload
...ok like this method is a bit faster than the chosen answer, something like 20% on my iphone4.
– chrisben
Aug 29 '13 at 15:52
7
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How to speed up insertion performance in PostgreSQL
...jor speed improvements with UNLOGGED? A quick test shows something like 10-20% improvement.
– serg
Feb 6 '17 at 23:25
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Beyond Stack Sampling: C++ Profilers
...ibraries. Be sure to do the same, otherwise you'll see that CRT is taking 20% of your application's time when what's really going on is malloc is trashing the heap and eating up 15%.
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