Prompt
Minimize memory allocations by avoiding intermediate objects, sharing underlying buffers, and eliminating unnecessary array operations. This is particularly important in hot code paths and when processing large datasets.
Key strategies:
- Share underlying buffers instead of copying data:
Buffer.from(arg.buffer, arg.byteOffset, arg.byteLength)instead ofBuffer.from(arg) - Avoid creating intermediate arrays when chaining operations: inline map operations rather than creating separate arrays
- Construct objects directly when possible:
new Uint8Array(value)instead ofnew Uint8Array(Buffer.from(value).buffer) - Move expensive computations out of frequently called functions to constructors or initialization phases
- Only store data structures when the intermediate results are actually needed
Example of optimization:
// Before: Creates unnecessary intermediate array
const results: Value[] = []
for (const arg of node.args) {
results.push(await this.interpretNode(arg, queryable, scope, generators))
}
return results[results.length - 1]
// After: Only compute what's needed
let lastResult: Value
for (const arg of node.args) {
lastResult = await this.interpretNode(arg, queryable, scope, generators)
}
return lastResult