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Best way to check if object exists in Entity Framework?
...housands of database calls were being made to check for duplicates (so the CPU sent a lot of time at 100%). In the end I decided to keep the last 100,000 records cached in memory. This way I could check for duplicates against the cached records which was extremely fast when compared to a LINQ quer...
【软著】软件著作权证书申请流程及注意事项，模板分享 - App Inventor 2 中...
...明专利来说，简单很多。只要你提供的材料及文档格式没问题，那就大概率能过。必须按照模板来写，参考模板见附件（源码模板带行号，自动就是每页50行），再配合下文的注意事项。
4、是否收费？一般来说，找第三方的...
Java logical operator short-circuiting
... short-circuiting.
Note that this is more than an attempt at saving a few CPU cycles: in expressions like this
if (mystring != null && mystring.indexOf('+') > 0) {
...
}
short-circuiting means a difference between correct operation and a crash (in the case where mystring is null)....
Visual studio long compilation when replacing int with double
...ibrary routines to do the translation, while integer math can just use the CPU instructions. At the time the IEEE defined the standard, they made some choices that were very uncommon in implementation, and especially that long ago much more expensive to implement in microcode, and of course the curr...
2016年最适合小投资的10个创业项目 - 资讯 - 清泛网 - 专注C/C++及内核技术
...成本1-2元，收50-80元，日收活在50件以上，加上各种疑难问题衣服处理，扣除工商、税务、水电、房租等费用，年利可达8万元以上。
项目二、宠物产业
花3-5万元开家庞物用品店，投入少、利润高，不需要过多专业技术，最为切...
【HarmonyOS】编译、测试全流程 - HarmonyOS NEXT - 清泛IT社区，为创新赋能！
...模拟器测试无需证书，Debug签名可自动完成
七、常见问题 FAQ
Q1：可以跳过证书直接在真机上测试吗？
不可以。鸿蒙真机强制要求签名。但模拟器不校验签名，可以用来快速测试。
Q2：Debug 签名和 Release 签名的 HAP 有什...
Why is my program slow when looping over exactly 8192 elements?
...e div per pixel. Each loop using less local var than there are register in CPU. The other require 7 increments, 6 decrements, 1 div and between 10 to 20 mul for addressing depending on compiler optimization. Also each instruction in the loop require the result of the previous instruction, this disca...
Difference between Groovy Binary and Source release?
...ore common on linux systems because linux systems can dramatically vary in cpu, installed library versions, kernelversions and nearly every linux system has a compiler installed.
binary releases are common on ms-windows systems. most windows machines do not have a compiler installed.
...
How to find out which view is focused?
...()
Be aware this thread runs in a 100ms cycle so it doesn't overflow the CPU with unnecessary work.
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How do I include a pipe | in my linux find -exec command?
... advantage of xargs would be, that you can speed it with modern multi core cpu even more up, by using the -P switch (-P 0).
– flolo
Nov 20 '08 at 23:03
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