| Time |
S |
Nick |
Message |
| 01:23 |
|
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aditsu joined ##friendlyjava |
| 02:44 |
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aditsu joined ##friendlyjava |
| 02:45 |
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aditsu_ joined ##friendlyjava |
| 02:48 |
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Frank89RM_ joined ##friendlyjava |
| 06:38 |
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noreason joined ##friendlyjava |
| 07:40 |
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usandfriends joined ##friendlyjava |
| 08:58 |
|
mr_lou |
Trivialt topic. |
| 08:58 |
|
mr_lou |
Which is better/faster? |
| 08:58 |
|
mr_lou |
string.startsWith(), or |
| 08:58 |
|
mr_lou |
string.substring() ? |
| 09:11 |
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noreason |
mr_lou it depends on condition isnt it ? |
| 09:12 |
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noreason |
startsWith is completely different case with subString() dont you think so ? |
| 09:18 |
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noreason |
jeez all the guyz are here uses framework always :P awww |
| 09:32 |
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noreason |
i like regex than loop |
| 09:35 |
|
mr_lou |
Fine |
| 09:35 |
|
mr_lou |
string.startsWith("Hi") vs string.substring(0,1).equals("Hi") |
| 09:35 |
|
mr_lou |
Better? |
| 09:36 |
|
mr_lou |
Ups |
| 09:36 |
|
mr_lou |
substring(0,2) |
| 09:37 |
|
* mr_lou |
reminds noreason this is #friendlyjava. Attitudes belong elsewhere. |
| 09:38 |
|
mr_lou |
I suppose I could just run my own test, as I usually do. |
| 09:56 |
|
mr_lou |
Wow.... substring().equals is faster. Didn't expect that. |
| 09:57 |
|
mr_lou |
236 seconds to ask a million times or so. 250 seconds to ask for startsWith() |
| 10:03 |
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noreason joined ##friendlyjava |
| 11:05 |
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pdurbin |
technically it's ##friendlyjava :) |
| 13:48 |
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Patch_ joined ##friendlyjava |
| 14:20 |
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Patch joined ##friendlyjava |
| 16:17 |
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mr_lou |
Oh right. |
| 16:33 |
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pdurbin |
:) |
| 17:39 |
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aditsu |
mr_lou: a whopping 5% faster? :) |
| 17:43 |
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mr_lou |
hehe |
| 17:43 |
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mr_lou |
I'm still surprised though. I expected startsWith to be faster. |
| 17:43 |
|
mr_lou |
Remarkably faster. |
| 17:44 |
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mr_lou |
And then instead, it's slower. |
| 17:44 |
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stuntmania joined ##friendlyjava |
| 17:57 |
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mr_lou |
Hm, interesting. |
| 17:57 |
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mr_lou |
I just ran the test again, but this time only asking for 1 character. The previous test was for 2 characters. |
| 17:57 |
|
mr_lou |
Now startsWith is faster. |
| 17:57 |
|
mr_lou |
Takes 207 seconds, while substring().equals() takes 223 seconds. |
| 17:58 |
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aditsu |
try 20 chars or something |
| 18:00 |
|
mr_lou |
Alright |
| 18:07 |
|
mr_lou |
With 20 characters, substring().equals() takes 237 seconds. |
| 18:12 |
|
mr_lou |
I feel I'm waiting forever for startsWith() to complete. |
| 18:14 |
|
mr_lou |
startsWith() takes 569 seconds. |
| 18:14 |
|
aditsu |
:O |
| 18:14 |
|
mr_lou |
yea... |
| 18:19 |
|
mr_lou |
Testing again with 1 char, adding charAt(0) as well. |
| 18:19 |
|
mr_lou |
But keeping string length from before. |
| 18:38 |
|
mr_lou |
Wow |
| 18:38 |
|
mr_lou |
substring(0,1).equals() took 205 seconds. |
| 18:38 |
|
mr_lou |
startsWith() took 186 seconds |
| 18:38 |
|
mr_lou |
charAt(0) took 37 seconds. |
| 18:49 |
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aditsu |
of course charAt is fast |
| 18:54 |
|
* mr_lou |
wonders of obfuscators are clever enough to convert startsWith() to charAt(0) when only one char is used. |
| 18:54 |
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mr_lou |
*if |
| 18:58 |
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aditsu |
that would be an optimizer, not obfuscator :) |
| 18:58 |
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aditsu |
anyway, you'd also need a length check |
| 19:01 |
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mr_lou |
Well, aren't optimizers usually built into obfuscators? |
| 19:04 |
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aditsu |
don't know enough obfuscators to answer that :p |
| 20:00 |
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noreason joined ##friendlyjava |
| 20:00 |
|
noreason |
mr_lou |
| 20:21 |
|
mr_lou |
What? |
| 20:22 |
|
noreason |
help plz |
| 20:22 |
|
noreason |
mr_lou |
| 20:23 |
|
noreason |
want to find difference between dates |
| 20:24 |
|
noreason |
aditsu |
| 20:25 |
|
mr_lou |
Really sounds like something you can find easily with google |
| 20:28 |
|
noreason |
tried couple of those seriously i'm getting confused |
| 20:32 |
|
mr_lou |
http://stackoverflow.com/questions/1555262/calculating-the-difference-between-two-java-date-instances |
| 20:37 |
|
noreason |
they talk about joda library |
| 20:37 |
|
noreason |
i dont use more library |
| 20:39 |
|
aditsu |
noreason: you can convert them to milliseconds and subtract |
| 20:39 |
|
noreason |
i used Calendar |
| 20:39 |
|
noreason |
than dateformat err didnt work |
| 20:43 |
|
noreason |
want to shift java 8 FASTTTTTTTTTTTTTTTTTTTTTTTT |
| 20:48 |
|
mr_lou |
noreason, So you don't have two Date objects? You have two Calendar objects that you wish to substract to know how long time is between them? |
| 20:49 |
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noreason |
k its my bad , made a mistake |
| 20:49 |
|
noreason |
aditsu its all my mistake |
| 20:49 |
|
mr_lou |
Calendar objects has a getTimeInMillis() function you can call. |
| 20:49 |
|
noreason |
mr_lou fine! |
| 20:50 |
|
mr_lou |
long timeBetweenDates = calendar1.getTimeInMillis() - calender2.getTimeInMillis(); |
| 20:52 |
|
noreason |
mr_lou i got it working |
| 20:52 |
|
noreason |
<noreason> k its my bad , made a mistake |
| 20:52 |
|
noreason |
<noreason> aditsu its all my mistake |
| 20:53 |
|
noreason |
aditsu why i make alot of mistakes am i learning ? :* |
