Q18: What is profile mode and when do you use it? GET START Mid Top 68 Flutter Interview Questions Flutter 68 Answer In profile mode, some debugging ability is maintained—enough to profile your app’s
performance.
Profile mode is used when you want to analyze performance.
Profile mode is disabled on the emulator and simulator, because their behavior is n
ot representative of real performance.
On mobile, profile mode is similar to release mode, with the following differences:
- Some service extensions, such as the one that enables the performance overlay, ar
e enabled. - Tracing is enabled, and tools supporting source-level debugging (such
as DevTools) can connect to the process.
Profile mode for a web app means that: - The build is not minified but tree shaking
has been performed. - The app is compiled with the dart2js compiler.
The command flutter run --profile compiles to profile mode.
Q19: What is release mode and when do you use it? GET START Mid Top 68 Flutter Interview Questions Flutter 68 Answer Use release mode for deploying the app, when you want maximum optimization and mini
mal footprint size.
Use release mode when you are ready to release your app.
For mobile, release mode (which is not supported on the simulator or emulator), mea
ns that: - Assertions are disabled. - Debugging information is stripped out. - Deb
ugging is disabled. - Compilation is optimized for fast startup, fast execution, an
d small package sizes. Service extensions are disabled.
Release mode for a web app means that: - The build is minified and tree shaking has
been performed. - The app is compiled with the dart2js compiler for best performanc
e.
The command flutter run --release compiles to release mode.
You can compile to release mode for a specific target with flutter build .
