如何使用 IQ Option 交易加密货币?

03-17 1954

pytest: helps you write better programs¶

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Creating call graph

I am looking for a possibility to generate a call graph for Go projects. Something similar to Doxygen's diagram functionality for C++ classes (with the option CALL_GRAPH=YES).

This samples the call stack of your program 100 times per second while the program is running and creates a graph useful for profiling. If your program spends most of its time in functions not relevant to you, I found this solution not very usefull.

Then there is this:

which from its description sounds like what I would need, but there seem to be no docs and I don't understand how to use it.

but they create only dependency graphs.

4 Answers 4

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Take a look here:

Build and run your program as per normal. You'll see the profiling hook mentioned:

Run your program (bench 如何使用 IQ Option 交易加密货币? it, run through it, etc) to generate the profile during runtime. Once you've hit what you want, quit and then generate the call-graph:

You can also run go tool pprof $YOURPROGBINARY cpu.如何使用 IQ Option 交易加密货币? pprof to get an interactive prompt where you can call top10 or web to generate an svg. Type help at the pprof prompt 如何使用 IQ Option 交易加密货币? to get a list of commands.

e.g. - here's the CPU profile for a buffer pool implementation I wrote:

And here's a quick way to generate a PNG from the prompt:

Which outputs this:


One of my problems is that I am 如何使用 IQ Option 交易加密货币? also interested in functions which are executed only once (during setup). Is there a way to increase the sampling rate of the tool, s.t. the probability increases that short running functions are also sampled?

The sampling rate is hardcoded in runtime/pprof.go:587 via runtime.SetCPUProfileRate(hz) with hz=100, i.e. 100 samples per second. If one calls runtime.SetCPUProfileRate(desiredSamplingRate) before calling profile.Start(), one can override this. Trying to set the sampling rate after calling profile.Start() will not work ("runtime: cannot set cpu profile rate until previous profile has finished.").

Still it does not solve my problem, since my program spends most of its time in http calls or waiting and the reason why I want the call graph is 如何使用 IQ Option 交易加密货币? not for profiling but for understanding the logic of the code (not my own). I want to know how the separate components work together, i.e. which function calls which other function / the flow of the program.

You were close with … /x/tools/go/callgraph/static . I'm pretty sure go install golang.org/x/tools/cmd/callgraph is what you want. Once installed run it without arguments to see it's full help/usage.如何使用 IQ Option 交易加密货币?

(In general, the things under … /x/tools/ are somewhat reusable packages with command line front-ends living under … /x/tools/cmd , you can install them all with go install golang.org/x/tools/cmd/. , the literal /. matches all sub-packages).

E.g. running just callgraph produces usage output that starts with:

callgraph: display the the call graph of a Go program.


callgraph [-algo=static|cha|rta|pta] [-test] [-format=. ] .


如何使用 IQ Option 交易加密货币? 如何使用 IQ Option 交易加密货币?

-algo Specifies the call-graph construction algorithm, one of:

-test Include the package's tests in the analysis.

-format Specifies the format in which each call graph edge is displayed. One of:

It can produce arbitrary formatted output (using Go's template syntax) or graphviz or digraph output. The last is a tool you can install with go install golang.org/x/tools/cmd/digraph (and once again, full/help usage is seen by running it without arguments) and can answer queries about arbitrary directed graphs (including call graphs obviously).

【方法】在Visual Studio中使用Qt

yzy_1996 于 2018-08-22 11:00:03 发布 53844 收藏 153


然后类似的打开项目设置,这样才会给你的项目加载Qt,不然会报错There's no Qt version assigned to this project for platform x64. Please use the 'change Qt version.


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1 安装Qt5.6.2 省略 2 安装Visual Studio 2013 省略 3 下载安装Qt Visual Studio Tools 打开“工具->扩展和更新” 点击“联机”,搜索框输入“qt”,即可出现要找的Qt Visual Studio Tools,选择下载并安装即可 安装完成后即可VS工具栏看到QT VS TOOLS 4 如何使用 IQ Option 交易加密货币? 新建项目Qt GUI Application .

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用了这么久的Qt,IDE一直都是VS与Creator并用(实际开发以VS为主),至于哪个更好这里不发表看法,各有所长,而且也因人而异,萝卜青菜,各有所爱。 Qt5发布很久之后,才把版本从之前的4.8升级到5.1。现5.2发布了,果断换上,先尝尝鲜。加上之前也一直有人问我关于VSQt的集成,此一并记录。。。 环境:VS2010 + Qt5.2

03-17 1954

如果希望使用VS开发带有QT的项目的时候 虽然能够VS创建QT的界面,但是想使用QT Creator方便的跳转到槽等功能的时候,我自己用了多种办法,试验下拉是没有办法使用的。 但是这个功能确实能让我们少些很多代码,毕竟这些都是体力活,我们又希望使用,要怎么办呢? 1.创建工程的时候QT Creator来创建项目,这样会生成一个*.pro的文件 2.项目创建完成之后,使用VS导入*.pro文件即可 这样就可以使用VS来编译调试运行项目 需要使用跳转到槽的功能,就是用QT Creato

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VS+QT开发环境搭建 1、工具准备 VisualStudio最新版直接官网下载,根据需要进行下载,我下载的免费社区版本。日常开发完全够用。 QT建议不要下最新版本,同样,为了减少病毒的风险,直接官网下载。我下载的5.12版本 进入后,下载与电脑相对应的版本 接下来就是等待下载时间 2、工具安装 VS安装 建立不要安装全部软件包,太占用地方。如果只用C++,那么就可以只安装C++的软件包。 双击VS的安装文件 选择自己需要的安装的类目。我只需要C++,因此仅勾选下图一个选项 接下来就是一值选择下一项

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昨天快速入门了一下VS上开发QT,主要参考的Qt入门教程:1天玩转Qt。本文也算是这个简单教程的摘要。 1. 背景 Qt 不仅仅是一个GUI库,它除了可以创建漂亮的界面,还有很多其他组件,例如,你不再需要研究STL,不再需要C++的头文件,不再需要去找解析XML、连接数据库、Socket 的各种第三方库,这些 Qt 都已经内置了。 独立安装:Qt 程序最终会编译为本地代码,不需要其他库的支撑,而 Java 要安装虚拟机,C#要安装 .NET Framework。 但是,由于Android本身支持Java

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WTQRookie 于 2020-06-09 14:39:44 发布 4560 收藏 18


在vs2019中搜索下载qt vs tools



在visual studio网站中下载








如果安装时出现双击扩展安装没有反应,打开Visual Studio Installer



当你安装成功扩展就会发现扩展中已经出现qt vs tool 了