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What is the purpose of XORing a register with itself? [duplicate]
...y, in the big picture it's faster. There are fewer bytes that have to be fetched from RAM.
– Loren Pechtel
Dec 7 '09 at 0:21
12
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How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...nch prediction does work. Taken branches are problematic for instruction-fetch and decode even when they're predicted perfectly. Some CPUs statically predict branches that aren't in their history table, usually with assume not-taken for forward branches. Intel CPUs don't work that way: they don't...
How to run functions in parallel?
...same time" and thinking you can is just plain wrong. Depending on how many cpus you have, the load of the machine, the timing of many things happening on the computer will all have an influence on the time the threads/process start. Also, since the processes are started right after creation, the ove...
MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
MySQL一次主从数据不一致的问题解决过程情况时这样的：昨天晚上主动2个机器都迁移了，然后今天才把主动重新连接上，但是从库的偏移量是从今天当前时刻开始的，也就是说虽然现在主...情况时这样的：
昨天晚上主动2个机器...
为什么你得学些 TCP 的知识？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...时候，我又记起来了。
所以我认为——这不可能是我的问题，可能吗？可能吗？？然后我发了一封邮件给我团队说：“我想我快要疯了，但是这可能是 TCP 的问题”。
所以我提交了一次修订，将我的应该调整为 TCP_NODELAY，然后...
卸载SQL Server2000后不能再次安装的问题解决方法 - 更多技术 - 清泛网 - ...
卸载SQL Server2000后不能再次安装的问题解决方法SQL Server2000 ,卸载问题曾经由于磁盘空间的问题，卸载了SQL Server2000，可当再次要把它安装上的时候，却怎么也不行了。无论是安装哪一个版本，永远都是同样的错...曾经由于磁盘空...
为什么你得学些 TCP 的知识？ - 环境配置 - 清泛IT社区，为创新赋能！
...时候，我又记起来了。
所以我认为——这不可能是我的问题，可能吗？可能吗？？然后我发了一封邮件给我团队说：“我想我快要疯了，但是这可能是 TCP 的问题”。
所以我提交了一次修订，将我的应该调整为 TCP_NODELAY，然后...
卸载SQL Server2000后不能再次安装的问题解决方法 - 数据库(内核) - 清泛网...
卸载SQL Server2000后不能再次安装的问题解决方法曾经由于磁盘空间的问题，卸载了SQL Server2000，可当再次要把它安装上的时候，却怎么也不行了。无论是安装哪一个版本，永远都是同样的错 曾经由于磁盘空间的问题，卸载了SQL S...
Are Java static calls more or less expensive than non-static calls?
...( duration, test );
printStream.printf( "%15s | %10d\n", test.getClass().getSimpleName(), iterations );
}
}
long runTest( int duration, Test test ) throws Exception
{
test.terminate = false;
test.count = 0;
Thread thread = new Thread( test );
...
How do function pointers in C work?
...multiple versions of some functions to take advantage of SSE, popcnt, AVX, etc. At startup, set your function pointers to the best version of each function for the current CPU. In your other code, just call through the function pointer instead of having conditional branches on the CPU features eve...