The performance compare when create many constraint use different language realize kiwi, why my c++ code is slow? about kiwi HOT 4 CLOSED

On Mon, Nov 15, 2021 at 9:32 AM xtuzy ***@***.***> wrote: Hi, i try to use different language run kiwi, they are js,C#,C++. - js use this library kiwi.js <https://github.com/IjzerenHein/kiwi.js> , - C# i use kiwi-net <https://github.com/olegku/kiwi-net>, - c++ use this library, i copy all .h to C++ Console App that is created by VisualStudio default. I define a View: class VirtualView { public: Variable left; public: Variable top; public: Variable width; public: Variable height; public: Variable right; public: Variable bottom; } Then create 500 View, their constraint depend on view that on front of they. All C++ code: #include <iostream> #include "kiwi/kiwi.h" #include <string> #include<sys/timeb.h> using namespace std; using namespace kiwi; long systemtime() { timeb t; ftime(&t); return t.time * 1000 + t.millitm; } class VirtualView { public: Variable left; public: Variable top; public: Variable width; public: Variable height; public: Variable right; public: Variable bottom; }; int main() { std::cout << "Hello World!\n"; std::cout << "Kiwi C++ Constrain 500 View Test Start\n"; long startTime = systemtime(); Solver solver; VirtualView superView; solver.addConstraint((superView.left== 0)| strength::required); solver.addConstraint((superView.right== 0| strength::required)); solver.addConstraint((superView.right-superView.left-superView.width==0)| strength::required); solver.addConstraint((superView.bottom-superView.top-superView.height==0| strength::required)); solver.addEditVariable(superView.width, strength::create(999,1000,1000)); solver.addEditVariable(superView.height, strength::create(999,1000,1000)); solver.suggestValue(superView.width, 300); solver.suggestValue(superView.height, 200); VirtualView preview = superView; for (int i = 0; i < 500; i++) { VirtualView subView3; solver.addConstraint(-subView3.width+subView3.right - subView3.left==0 | strength::required); solver.addConstraint(-subView3.height+subView3.bottom - subView3.top==0 | strength::required); solver.addConstraint(subView3.left- preview.left==0 | strength::required); solver.addConstraint(subView3.top- preview.top==0 | strength::required); solver.addConstraint(subView3.bottom-preview.bottom==0 | strength::required); solver.addConstraint(subView3.width- preview.width==0 | strength::required); preview = subView3; } solver.updateVariables(); long endTime = systemtime(); std::cout << "Spend time:"; std::cout << (endTime-startTime); std::cout << "ms"; } - js spend time <1000ms - C# 2000ms < spend time < 4000ms - c++ 1min << spend time ; very vesy slowly I believe c++ is fast, it is my fault, but i don't know where the mistake is. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#121>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AABBQSJSHS32CYAYW6TF2YTUMERXLANCNFSM5IB7JVPQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.