Eliminate redundant operations

Identify and eliminate repeated expensive operations to improve performance. Look for opportunities to cache results, avoid duplicate computations, and minimize unnecessary work.

Key strategies:

• Memoize expensive operations: Cache results of file reads, hash computations, and API responses that are called multiple times
• Avoid redundant parsing: Don’t parse the same data multiple times; use simple checks like item.startsWith('[') before expensive operations like JSON.parse()
• Skip unnecessary operations: Check if work is actually needed before performing it (e.g., check if ECR repository exists before attempting removal)
• Use efficient file operations: Prefer moving files over copying when working with temporary directories

Example of memoization:

// Before: Reading package.json multiple times
const packageJson = JSON.parse(fs.readFileSync('package.json'));

// After: Memoize the operation
this._readPackageJson = _.memoize(this._readPackageJson.bind(this));

Example of avoiding redundant parsing:

// Before: JSON.parse in both filter and map
.filter((item) => item !== '' && Array.isArray(JSON.parse(item)))
.map((item) => JSON.parse(item))

// After: Simple check first, parse once
.filter((item) => item.startsWith('['))
.map((item) => JSON.parse(item))

This approach reduces CPU usage, memory allocation, and I/O operations, leading to faster execution times and better resource utilization.