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What techniques can you use to profile your code

前提是你 提交于 2019-12-05 20:59:37
Some of the platforms that I develop on, don't have profiling tools. I am looking for suggestions/techniques that you have personally used to help you identify hotspots, without the use of a profiler. The target language is C++. I am interested in what you have personally used. I've found the following quite useful: #ifdef PROFILING # define PROFILE_CALL(x) do{ \ const DWORD t1 = timeGetTime(); \ x; \ const DWORD t2 = timeGetTime(); \ std::cout << "Call to '" << #x << "' took " << (t2 - t1) << " ms.\n"; \ }while(false) #else # define PROFILE_CALL(x) x #endif Which can be used in the calling

golang profile with pprof, how to get hit count not duration?

僤鯓⒐⒋嵵緔 提交于 2019-12-05 15:53:30
how to get hit count like: (pprof) top Total: 2525 samples 298 11.8% 11.8% 345 13.7% runtime.mapaccess1_fast64 268 10.6% 22.4% 2124 84.1% main.FindLoops not, durations like: (pprof) top 2220ms of 3080ms total (72.08%) Dropped 72 nodes (cum <= 15.40ms) Showing top 10 nodes out of 111 (cum >= 60ms) flat flat% sum% cum cum% 1340ms 43.51% 43.51% 1410ms 45.78% runtime.cgocall_errno env: I using golang1.4, add below codes. defer pprof.StopCPUProfile() f, err := os.Create("innercpu.pprof") if err != nil { fmt.Println("Error: ", err) } pprof.StartCPUProfile(f) A.Glyzov You can use go tool pprof

How to set spring boot active profile in Gradle 4.7

时光怂恿深爱的人放手 提交于 2019-12-05 12:27:08
Overall: I'm trying to run gradle build task for a specific spring profile but I've got an error in passing following test: au.com.mnpd.security.JwtTokenUtilTest > generateToken_succeeds FAILED java.lang.IllegalStateException Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException Caused by: org.springframework.beans.factory.BeanCreationException Caused by: java.lang.IllegalArgumentException The test is using some properties

Rails: One model for Authentication and Profile information or 2 separate models

你。 提交于 2019-12-05 11:01:25
In many tutorials (especially for authentication), speakers say to put user authentication and profile information in the same table (model) called User. My question is simple: Is it safe to put everything in one table? (bonus: is this the best practice?) I would rather suggest to separate authentication information (email, password, salt,...) and profile information (first name, last name, birth day, location, gender,...) in two models: User (for authentication) and Profile, and linking models by has_one/belongs_to associations. Am I wrong? What do you suggest me? Thanks. gabrielhilal If you

Environment abstraction

允我心安 提交于 2019-12-05 07:32:34
##Environment abstraction (环境抽象) Environment是容器重要的抽象,它集成了应用两个重要的方面:profiles和properties; 一个Profile是一组已命名的有逻辑的bean定义,只有当特定的profile启动时,它们才在容器里注册.Beans可以通过xml或者注解来指定其profile值.Environment对象在profiles中的角色决定目前哪个profile会被启动,哪个profile是默认启动. Properties在所有的应用中都起重要作用,它可以从以下资源中产生:properties文件,JVM系统属性,系统环境变量,JNDI,servlet上下文参数,特定的Properties对象,Maps,等.Environment对象与属性的关系是提供使用者一个合适的服务接口来配置属性资源,并从中释放属性. ###7.13.1 Bean definition profiles bean定义中的Profiles bean定义的profiles是一个核心容器的机制,允许在不同的环境里注册不同的bean.这个单词"environment"对不同的用户代表不同的事物,这个功能在很多场景下给你提供帮助,包括: 开发中使用内存数据库 VS 在QA或production中使用从JNDI中查找相同的数据源.

Please explain FQL profile table pic_crop

ぃ、小莉子 提交于 2019-12-04 21:27:21
What do the coordinates returned by querying pic_crop mean when related to a profile picture. I have tried working this one out by cannot figure it! Please help! The values for left, top, right and bottom are a decimal like e.g. left 0.20115. What does 0.20115 mean? If you look at the source code for a facebook profile you will see that facebook is using a percentage to offset the profile photo. How does 0.20115 translate to facebook source of style="left:-23.13%;" Looking at a few examples of pic_crop from my friends' profiles, it seems like the left, right, top, bottom figures are

Predicting DXL Memory and CPU Usage

最后都变了- 提交于 2019-12-04 20:59:44
Has anyone had any success in predicting or profiling DXL applications for memory and CPU usage? I have a script that opens, closes, and modifies modules, possibly hundreds or even thousands of modules. I want to know, or least have a rough idea, how many modules I can run through the script before running out of memory. Cross posts: http://smartdxl.com/forum/viewtopic.php?f=1&t=602 https://www.ibm.com/developerworks/community/forums/html/topic?id=c5d4cc33-9986-463e-a73b-36523e6add7a&ps=25 来源: https://stackoverflow.com/questions/19422567/predicting-dxl-memory-and-cpu-usage

Mule poolExhaustedAction

大城市里の小女人 提交于 2019-12-04 20:50:06
I'm trying to make sure I understand the meaning of the poolExhaustedAction values for a threading profile. I'm not seeing a lot of examples out there. Assume I have a thread pool on an HTTP endpoint that has maxThreadsActive set to "16". I receive 20 inbound requests in a short period (faster than I can process any of them). If poolExhaustedAction is set to "WAIT" then the last 4 requests will wait for threadWaitTimeout. Is this correct? If poolExhaustedAction is set to "RUN" then the last 4 requests will ????...use the thread that carried the request to the endpoint to run the flow???? I'm a

What is the difference between the various shell profiles?

心已入冬 提交于 2019-12-04 20:11:44
问题 What's the difference between ~/.bashrc, ~/.bash_login, ~/.bash_logout, ~/.bash_profile, ~/.profile, /etc/profile, /etc/bash.bashrc, /etc/ssh/ssh_config and sshd_config, when are they loaded and what are their purposes? 回答1: The man page for bash says there are the following initialization files for bash shells: /etc/profile The systemwide initialization file, executed for login shells /etc/bash.bashrc The systemwide per-interactive-shell startup file /etc/bash.bash.logout The systemwide

Ruby on Rails - Creating a profile when user is created

不问归期 提交于 2019-12-04 18:08:01
So basically I have wrote my own authentication instead of using a gem so I have access to the controllers. My user creation works fine but when my users are created I want to also create a profile record for them in my profile model. I have got it mostly working I just cant seem to pass the ID from the new user into the the new profile.user_id. Here is my code for the user creation in my user model. def create @user = User.new(user_params) if @user.save @profile = Profile.create profile.user_id = @user.id redirect_to root_url, :notice => "You have succesfully signed up!" else render "new" end