Optimize config.ini updates and efficiency improvements report

Summary

This PR optimizes AVD configuration updates by batching multiple shell executions into a single command, reducing process spawns from up to 5 to 1. This includes both the TypeScript source changes and the compiled JavaScript distribution files.

Primary Fix: Batched Config.ini Updates

File: src/emulator-manager.ts (Lines 40-62)

Before: The code executed up to 5 separate shell commands to append configuration entries:

if (cores) {
  await exec.exec(`sh -c \\"printf 'hw.cpu.ncore=${cores}\n' >> ${process.env.ANDROID_AVD_HOME}/"${avdName}".avd"/config.ini`);
}
if (ramSize) {
  await exec.exec(`sh -c \\"printf 'hw.ramSize=${ramSize}\n' >> ${process.env.ANDROID_AVD_HOME}/"${avdName}".avd"/config.ini`);
}
// ... 3 more similar calls

After: All configuration entries are batched into a single shell execution:

if (cores || ramSize || heapSize || enableHardwareKeyboard || diskSize) {
  const configEntries: string[] = [];
  // ... collect all config entries
  if (configEntries.length > 0) {
    const configContent = configEntries.join('\\n') + '\\n';
    await exec.exec(`sh -c \\"printf '${configContent}' >> ${process.env.ANDROID_AVD_HOME}/"${avdName}".avd"/config.ini"`);
  }
}

Performance Impact

• Reduces shell executions: From up to 5 separate calls to 1 batched call
• Eliminates process spawn overhead: Up to 80% reduction in process creation when multiple config options are set
• Maintains exact same functionality: No behavioral changes, all existing tests pass

Comprehensive Efficiency Analysis

1. Multiple Shell Executions for Config.ini Updates (HIGH IMPACT) ⚡ - FIXED

Issue: The code executed up to 5 separate shell commands to append configuration entries to the AVD config.ini file.
Impact: Each shell execution spawns a new process, which is expensive. When multiple config options are set, this results in 5 separate process spawns.
Solution: Batch all configuration entries into a single shell command.
Performance Gain: Reduces shell executions from 5 to 1 (up to 80% reduction in process spawns).

2. Inefficient Channel Mapping (MEDIUM IMPACT)

File: src/channel-id-mapper.ts (Lines 1-13)
Issue: Uses if-else chain instead of a lookup table/map for channel name to ID mapping.
Impact: O(n) lookup time instead of O(1), though with only 4 channels the impact is minimal.
Solution: Replace with a Map or object lookup.
Performance Gain: Constant time lookup instead of linear search.

3. Repeated Number Conversions (LOW IMPACT)

File: src/input-validator.ts (Lines 79, 92, 97)
Issue: The checkEmulatorBuild and checkDiskSize functions call Number() multiple times on the same string.
Impact: Unnecessary computation overhead.
Solution: Store the converted number in a variable and reuse it.
Performance Gain: Eliminates redundant type conversions.

4. Regex Creation on Every Function Call (LOW IMPACT)

File: src/script-parser.ts (Line 7)
Issue: Creates regex /\r\n|\n|\r/ on every parseScript function call.
Impact: Regex compilation overhead on each invocation.
Solution: Define regex as a module-level constant.
Performance Gain: Eliminates regex recompilation.

5. Redundant Boolean Validation Functions (LOW IMPACT)

File: src/input-validator.ts (Lines 39-76)
Issue: Multiple similar validation functions that all use the same isValidBoolean helper.
Impact: Code duplication and maintenance overhead.
Solution: Create a generic boolean validator function.
Performance Gain: Reduced code size and improved maintainability.

Implementation Priority

1. HIGH PRIORITY: Config.ini shell execution batching (implemented in this PR)
2. MEDIUM PRIORITY: Channel mapping optimization
3. LOW PRIORITY: Number conversion optimization
4. LOW PRIORITY: Regex constant optimization
5. LOW PRIORITY: Boolean validation consolidation

Testing

• ✅ All 34 existing tests pass
• ✅ TypeScript compilation successful
• ✅ ESLint/Prettier formatting compliance
• ✅ Built JavaScript files included in commit
• ✅ No functional changes or regressions

Link to Devin run

https://app.devin.ai/sessions/343965e5e61540f486bb164ee6416478

Requested by: Yang ([email protected])