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What exactly is LLVM?

... machine code). LLVM can also act as a JIT compiler - it has support for x86/x86_64 and PPC/PPC64 assembly generation with fast code optimizations aimed for compilation speed. Unfortunately disabled since 2013, there was the ability to play with LLVM's machine code generated from C or C++ code at ...
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Is < faster than

..., it will not be faster on most architectures. You didn't specify, but on x86, all of the integral comparisons will be typically implemented in two machine instructions: A test or cmp instruction, which sets EFLAGS And a Jcc (jump) instruction, depending on the comparison type (and code layout): ...
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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/...

...动2个机器都迁移了,然后今天才把主动重连接上,但从库的偏移量从今天当前时刻开始的,也就说虽然现在主...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连接上,但从库的偏移量从...
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Virtual Memory Usage from Java under Linux, too much memory used

...1.6-x64/jre/lib/amd64/libjava.so ... 00007fa1f34aa000 1576K r-x-- /lib/x86_64-linux-gnu/libc-2.13.so 00007fa1f3634000 2044K ----- /lib/x86_64-linux-gnu/libc-2.13.so 00007fa1f3833000 16K r-x-- /lib/x86_64-linux-gnu/libc-2.13.so 00007fa1f3837000 4K rwx-- /lib/x86_64-linux-gnu/libc-2.1...
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创业公司起名一个比一个有噱头 上海自嘲杭州恶搞南京最硬挣 - 创意 - 清泛...

...起名一个比一个有噱头 上海自嘲杭州恶搞南京最硬挣你在想最火的papi酱为什么要叫papi酱?好了,不要浪费你的脑细胞了,因为来自二次元世界的创业大神们,在公司起名这件事情上,永远不...你在想最火的papi酱...
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如何判断GIF动图 - C/C++ - 清泛网 - 专注C/C++及内核技术

如何判断GIF动图用记事本(或其他文本工具)打开图像文件,若单图像会发现JFIF的标识,若为动图,则会出现GIF。charstrGIF[3];memcpy( strGIF, pbyImag...用记事本(或其他文本工具)打开图像文件,若单图像会发现JFIF的标识...
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关于Rsyslogd 的一些配置 (高性能、高可用 rsyslogd) - C/C++ - 清泛网 - ...

...因网间带宽被调整后出现了日志堵塞的情况,更为严重的公司大量的业务日志也通过 PHP 的 syslog接口传输的...最近公司的日志传输服务器因网间带宽被调整后出现了日志堵塞的情况,更为严重的公司大量的业务日志也通...
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cmake与autoconf+automake的对比 - C/C++ - 清泛网 - 专注C/C++及内核技术

...ake的对比首先,拿他们对比本身没有太多的意义,他们都产生makefile文件的工具。cmake产生的晚,解决了很多autotools工具的问题。autotools一个...首先,拿他们对比本身没有太多的意义,他们都产生makefile文件的工具。cmake产...
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解决:Run-Time Check Failure #0,The value of ESP was not properly sav...

... 你定义函数指针原型时出错。 其实你定义的没有错,但编译器不认识而已,因为你调用的dll函数一个远函数,而且一个C函数,你得告诉编译器它个c函数才行。那么你就可以在定义该函数的时候加上一句话, FAR PASCAL ...
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coinitialize失败,返回值0x80010106 无法在设置线程模式后对其加以更改 ...

coinitialize失败,返回值0x80010106 无法在设置线程模式后对其加以更改无法在设置线程模式后对其加以更改错误代码:2147549446(0x80010106)经分析,因为调用CoInitialize()不当所致。遂改用CoInitializeEx(NUL...无法在设置线程模式后对其...