inline | 易学教程

C++ / VS2008: Performance of Macros vs. Inline functions

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问题 All, I'm writing some performance sensitive code, including a 3d vector class that will be doing lots of cross-products. As a long-time C++ programmer, I know all about the evils of macros and the various benefits of inline functions. I've long been under the impression that inline functions should be approximately the same speed as macros. However, in performance testing macro vs inline functions, I've come to an interesting discovery that I hope is the result of me making a stupid mistake

fis3学习笔记

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一、fis3是什么，能干什么？ FIS3 是面向前端的工程构建工具，可以解决前端中的性能优化，其实也就和gulp差不多，只不过gulp是轻量级的，需要什么操作，下载相对应的插件，而fis3已经集成好了很多功能。二、准备工作 1、首先要安装node和npm 2、安装fis3 --> npm install -g fis3 3、测试一下是否安装成功 --> fis3 -v 4、升级fis3 npm update -g fis3 或者重装 --> npm install -g fis3 三、熟悉fis3里面的命令 fis3里面内置了一个简易的web server，可以方便调试构建结果 1、fis3 server open -->打开web server的根目录（www目录） 2、fis3 release -->将构建结果发布到web server 的目录下面 3、fis3 release -d +路径 -->构建结果发布到指定的目录下面 4、fis3 server start -->启动本地web server（浏览器将会被打开） 5、fis3 release -w -->启动文件监听功能 6、fis3 release -wl -->浏览器自动刷新 7、fis3 server -h -->获取更多参数 8、fis3 server clean --> 清空web

“Could not get the type info from component xml schema” when loading a page in SiteEdit 2009

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问题 I enabled inline editing on SitEdit 2009 SP2 using the answer given here How do I enable inline field editing in SiteEdit when using an XSLT TBB? but I keep getting this error when loading the resulting page in SiteEdit: Sys.FormatException: Could not get the type info from component xml schema. Field: cf_tcm:20-33457-64_content_header XPath: [1] My XSLT TBB fragment: <xsl:if test="//*[local-name()='content_header'] != ''"> <h1> <div> <tcdl:ComponentField name="content_header" index="0"> <xsl

「SDOI2019」世界地图

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Address loj3112 luogu P5360 bzoj5531 Solution 对于 1 ≤ i ≤ m 1\leq i\leq m 1 ≤ i ≤ m ，考虑分别预处理经度在 [ 1 , i ] [1,i] [ 1 , i ] ， [ i , m ] [i,m] [ i , m ] 的点的 MST \text{MST} MST 。询问的时候合并 [ 1 , l − 1 ] [1,l-1] [ 1 , l − 1 ] 和 [ r + 1 , m ] [r+1,m] [ r + 1 , m ] 即可。先考虑怎么预处理 [ 1 , i ] [1,i] [ 1 , i ] 的 MST \text{MST} MST （ [ i , m ] [i,m] [ i , m ] 同理）。假设我们已经有了 [ 1 , i − 1 ] [1,i-1] [ 1 , i − 1 ] 的 MST \text{MST} MST ，现在要在这里加上经度为 i i i 的点和一些边。考虑加入一条边 ( u , v , w ) (u,v,w) ( u , v , w ) 会发生什么： 1. 1. 1 . u , v u,v u , v 不连通，连接 u , v u,v u , v 。 2. 2. 2 . u , v u,v u , v 已经连通，且路径 u → v u→v u → v 的边的最大值

What is the difference between macro & inline function with respect to execution speed?

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问题 How complier treats inline functions over macros to reduce execution time? 回答1: The compiler is also allowed to not inline the function if doing so would be faster, whereas the compiler cannot not inline a macro. In addition, inline functions are miles safer than macros. 回答2: Inline functions are very similar to macros because they both are expanded at compile time, but the macros are expanded by the preprocessor, while inline functions are parsed by the compiler. 回答3: The most important

What is the difference between macro & inline function with respect to execution speed?

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Sometimes F# doesn't inline functions even if it is marked `inline`?

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问题 let inline funA x = printf "A" x > 3 let inline funB myFun x = printf "B" myFun x let foo () = funB funA 7 IL for foo .method public static bool foo () cil managed { // Method begins at RVA 0x2278 // Code size 31 (0x1f) .maxstack 4 .locals init ( [0] class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.Unit, class [mscorlib]System.IO.TextWriter, class [FSharp.Core]Microsoft.FSharp.Core.Unit, class [FSharp.Core]Microsoft.FSharp.Core.Unit> ) IL_0000:

How to inline string.h function on linux?

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问题 I want to optimize some code such that all the functions in string.h will be inlined. I'm on x86_64. I've tried -O3, -minline-all-stringops and when I do "nm a.out" it shows it is calling the glibc version. Checking with gcc -S, I see the calls. What am I missing? There are dozens of #ifdef _SOME_SETTING_ in string.h, and bits/string3.h shows the inline version, but I don't know how to get there. for example: $ cat test.c #include <string.h> main() { char *a, *b; strcpy(b,a); } /* When

Kotlin reified type parameter doesn't smart cast

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问题 I was experimenting with setting uninitialized values and was trying to get the following to work. This is mostly a curiosity in the power (and limitations) of reified generics. I was attempting to provide default values for optional parameters of data classes. inline fun <reified T> uninitialized(): T = when (T::class) { Long::class -> -1L // Type mismatch. Required: T Found: Long String::class -> "" // Type mismatch. Required: T Found: String // and so on... else -> throw

Rails 3: how to render text file in-line?

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问题 All. A Rails n00b here... I'm writing an application that reports the status of a transaction. Some of the content in the rendered HTML comes from instance variables initialized in the controller, while other content comes from text files (e.g., log files) that I want to render in the HTML using <pre> tags. What is the "Rails Way" to do this? Thank you for your time... 回答1: <pre> <%= render :file => '/tmp/test.log' %> </pre> 回答2: Here you go: http://edgeguides.rubyonrails.org/layouts_and