All the onTap function is so slow, sometimes should click twice.

Details

This problem is existing on dev & master channel.
I am using IOS.
Gesture detector is not working well.

Logs

✓] Flutter (Channel master, v1.10.5-pre.25, on Mac OS X 10.14.6 18G95, locale zh-Hans-CN)
• Flutter version 1.10.5-pre.25 at /Users/weizhang/flutter
• Framework revision f8ba675 (34 分钟前), 2019-09-19 09:04:07 -0700
• Engine revision 1cada0a
• Dart version 2.6.0 (build 2.6.0-dev.0.0 ea969c358e)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at /Users/weizhang/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-29, build-tools 29.0.2
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 10.3, Build version 10G8
• CocoaPods version 1.7.5

[✓] Android Studio (version 3.5)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 39.0.3
• Dart plugin version 191.8423
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] VS Code (version 1.38.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.4.1

[✓] Connected device (1 available)
• “wei zhang”的 iPhone • 029252aa59e25c34188ac565344af93858a917b1 • ios • iOS 12.4.1