Create performance_others.md

.github/ISSUE_TEMPLATE/performance_others.md

+---
+name: My app has some non-speed performance issues.
+about: You are writing an application but have discovered that it uses too much memory, too much energy (e.g., CPU/GPU usage is high), or its app size is too large.
+title: ''
+labels: 'created via performance template'
+assignees: ''
+
+---
+
+<!-- Thank you for using Flutter!
+
+     If you are looking for support, please check out our documentation
+     or consider asking a question on Stack Overflow:
+      * https://flutter.dev/
+      * https://api.flutter.dev/
+      * https://stackoverflow.com/questions/tagged/flutter?sort=frequent
+
+     If you have found a performance problem, then fill our the template below.
+     Please read our guide to filing a bug first: https://flutter.dev/docs/resources/bug-reports
+-->
+
+## Details
+
+<!--
+1.  Please tell us exactly how to reproduce the problem you are running into, and how you measured the performance.
+
+2.  Please attach a small application (ideally just one main.dart file) that
+     reproduces the problem. You could use https://gist.github.com/ for this.
+
+3.  Switch flutter to master channel and run this app on a physical device
+     using profile mode with Skia tracing enabled, as follows:
+       flutter channel master
+       flutter run --profile --trace-skia
+     Then press ‘P’ to enable the performance overlay.
+
+     The bleeding edge master channel is encouraged here because Flutter is
+     constantly fixing bugs and improving its performance. Your problem in an
+     older Flutter version may have already been solved in the master channel.
+-->
+
+<!--
+     Please tell us which target platform(s) the problem occurs (Android / iOS / Web / macOS / Linux / Windows)
+     Which target OS version, for Web, browser, is the test system running?
+     Does the problem occur on emulator/simulator as well as on physical devices?
+-->
+
+**Target Platform:**
+**Target OS version/browser:**
+**Devices:**
+
+## Logs
+
+<!--
+     Run `flutter analyze` and attach any output of that command below.
+     If there are any analysis errors, try resolving them before filing this issue.
+-->
+
+```
+```
+
+<!-- Finally, paste the output of running `flutter doctor -v` here, with your device plugged in. -->
+
+```
+```