i18n performance test using i18n.Of, temporal variables and i18n.current

readme.md

Results are:

With Current

• direclty access to i18n(RunTime): 55185442.5 us.
• indireclty access to i18n(RunTime): 55758307.0 us.
• indireclty outside access to i18n(RunTime): 56177293.5 us.

With BuildContext

• direclty access to i18n(RunTime): 92459941.0 us.
• indireclty access to i18n(RunTime): 83667963.5 us.
• indireclty outside access to i18n(RunTime): 73185154.5 us.

With BuildContext and I18n.of without extension

• direclty access to i18n(RunTime): 90221982.5 us.
• indireclty access to i18n(RunTime): 79991600.0 us.
• indireclty outside access to i18n(RunTime): 70861710.0 us.
• indireclty outside access without extension to i18n(RunTime): 70502296.5 us.

test-i18n-perf.dart

import 'package:benchmark_harness/benchmark_harness.dart';
import 'package:drivers_app/common/extension/build_context_extension.dart';
import 'package:drivers_app/generated/l10n.dart';
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_test/flutter_test.dart';

import 'test_utils/i18n_utils.dart';

extension BuildContextExtensions on BuildContext {
  I18n get i18n => I18n.of(this);
}

class Directly extends BenchmarkBase {
  const Directly(this.times) : super('direclty access to i18n');

  final int times;

  @override
  void run() {
    for (var i = 0; i < times; i++) {
      final a = I18n.current.profile;
      final b = I18n.current.myLoads;
    }
  }
}

class Indirectly extends BenchmarkBase {
  const Indirectly(this.times) : super('indireclty access to i18n');

  final int times;

  @override
  void run() {
    for (var i = 0; i < times; i++) {
      final i18n = I18n.current;
      final a = i18n.profile;
      final b = i18n.myLoads;
    }
  }
}

class IndirectlyOutside extends BenchmarkBase {
  const IndirectlyOutside(this.times)
      : super('indireclty outside access to i18n');

  final int times;

  @override
  void run() {
    final i18n = I18n.current;

    for (var i = 0; i < times; i++) {
      final a = i18n.profile;
      final b = i18n.myLoads;
    }
  }
}

class DirectlyWithContext extends BenchmarkBase {
  const DirectlyWithContext(this.times, this.context)
      : super('direclty access to i18n');

  final int times;
  final BuildContext context;

  @override
  void run() {
    for (var i = 0; i < times; i++) {
      final a = context.i18n.profile;
      final b = context.i18n.myLoads;
    }
  }
}

class IndirectlyWithContext extends BenchmarkBase {
  const IndirectlyWithContext(this.times, this.context)
      : super('indireclty access to i18n');

  final int times;
  final BuildContext context;

  @override
  void run() {
    for (var i = 0; i < times; i++) {
      final i18n = context.i18n;
      final a = i18n.profile;
      final b = i18n.myLoads;
    }
  }
}

class IndirectlyOutsideWithContext extends BenchmarkBase {
  const IndirectlyOutsideWithContext(this.times, this.context)
      : super('indireclty outside access to i18n');

  final int times;
  final BuildContext context;

  @override
  void run() {
    final i18n = context.i18n;

    for (var i = 0; i < times; i++) {
      final a = i18n.profile;
      final b = i18n.myLoads;
    }
  }
}

class IndirectlyOutsideWithoutExtensionWithContext extends BenchmarkBase {
  const IndirectlyOutsideWithoutExtensionWithContext(this.times, this.context)
      : super('indireclty outside access without extension to i18n');

  final int times;
  final BuildContext context;

  @override
  void run() {
    final i18n = I18n.of(context);

    for (var i = 0; i < times; i++) {
      final a = i18n.profile;
      final b = i18n.myLoads;
    }
  }
}

void main() {
  const times = 9999999;

  setUp(() async {
    await i18nLoadLocale();
  });

  test('measuring', () async {
    const Directly(times).report();
    const Indirectly(times).report();
    const IndirectlyOutside(times).report();
  }, skip: true);

  testWidgets('measuring with context', (WidgetTester tester) async {
    await tester.pumpWidget(
      MaterialApp(
        localizationsDelegates: const [
          I18n.delegate,
          GlobalMaterialLocalizations.delegate,
          GlobalWidgetsLocalizations.delegate,
          GlobalCupertinoLocalizations.delegate,
        ],
        supportedLocales: I18n.delegate.supportedLocales,
        home: Builder(
          builder: (BuildContext context) {
            DirectlyWithContext(times, context).report();
            IndirectlyWithContext(times, context).report();
            IndirectlyOutsideWithContext(times, context).report();
            IndirectlyOutsideWithoutExtensionWithContext(times, context).report();

            return Container();
          },
        ),
      ),
    );
  });
}