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How to round up the result of integer division?
...nverting to floating point and back seems like a huge waste of time at the CPU level.
Ian Nelson's solution:
int pageCount = (records + recordsPerPage - 1) / recordsPerPage;
Can be simplified to:
int pageCount = (records - 1) / recordsPerPage + 1;
AFAICS, this doesn't have the overflow bug th...
How do you performance test JavaScript code?
CPU Cycles, Memory Usage, Execution Time, etc.?
22 Answers
22
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How to get milliseconds from LocalDateTime in Java 8
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"gives you the same results as" ... but takes more CPU power and stresses the garbage collector a lot more.
– VasiliNovikov
Dec 5 '18 at 15:12
1
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Append an object to a list in R in amortized constant time, O(1)?
...es due to the fact that the code we are testing is not yet loaded into the CPU's cache. Following the first run, we would expect the times to be fairly consistent, but occasionally our code may be evicted from the cache due to timer tick interrupts or other hardware interrupts that are unrelated to ...
婚庆O2O：领跑的企业也就只走到B轮 - 资讯 - 清泛网 - 专注C/C++及内核技术
...意思，很好玩？然并卵，怎么赚钱呐？如果不能解决这个问题，能叫商业创业吗？又不是过家家，自己嗨就行。当然如果只是闲着没事儿，想为爱晒幸福、秀恩爱的新人们多提供一些渠道，活着到也无妨。只是看你们撑的这么辛...
Joins are for lazy people?
...out joins. BUT in many cases, your development time is more important than CPU time and memory. Give up a little performance and enjoy your life. Don't waste your time for little little performance. And tell him "Why don't you make a straight highway from your place to your office?"
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Tools for JPEG optimization? [closed]
...sive works fine in basically everything, the only drawback is it uses more CPU to decode (not enough extra to matter).
– Ariel
Jul 29 '12 at 6:07
1
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Starting iPhone app development in Linux? [closed]
...e, I'm running OS X and Xcode on a virtualised (VMware) machine on Linux. CPU is a Core2Quad (Q8800), and it is perfectly fast. I found a prebuilt VM online (I'll leave it to you to find)
Xcode/iPhone development works perfectly, as does debugging via USB to the phone itself.
It actually surprise...
Unexpected results when working with very big integers on interpreted languages
...t version is 9223372036854775807
So it means either you are using 32 bit CPU or 32 bit OS or 32 bit compiled version of PHP. It can be found using PHP_INT_MAX. The sum would be calculated correctly if you do it on a 64 bit machine.
The max integer value in JavaScript is 9007199254740992. The larg...
How can I round up the time to the nearest X minutes?
... Just pointing out, modulus is a requires a division operation on the CPU. But I agree that it is more elegant that using the rouding down property of integer divisions.
– Alex
Feb 16 '17 at 15:17
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