python27-perf-optimizer

Optimizes Python 2.7 hot paths for NetEase MC Mod tick loops and event handlers.

Updated Apr 11, 2026
One-click install
npx skills add https://github.com/Coral5644/NekansModPack --skill python27-perf-optimizer-coral5644
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: python27-perf-optimizer
Source: https://github.com/Coral5644/NekansModPack/tree/main/.cursor/skills/python27-perf-optimizer
Command: npx skills add https://github.com/Coral5644/NekansModPack --skill python27-perf-optimizer-coral5644

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve? Performance-sensitive Python 2.7 code in NetEase MC Mod runtimes often suffers from frame drops and slow tick processing caused by exception abuse, repeated deep imports, inefficient branching, and redundant FFI calls. This Skill provides a structured review checklist and six targeted optimization guides to eliminate these hot-path bottlenecks. ## Core Features & Use Cases - Six Optimization Domains: Covers exception handling, dynamic imports, conditional branching, hash lookups, next() iteration, and FFI caching, each with a dedicated reference document. - Quick Decision Table: Maps symptoms like try/except in tick loops or string-concatenated dict keys directly to the relevant optimization guide. - Benchmark-Backed Guidance: Includes measured Python 2.7 timings (e.g., cached imports dropping from 3.105s to 0.578s per 10M calls) to validate each technique. - Use Case: When a mod's tick callback causes frame rate drops while iterating thousands of entities, use this Skill to identify exception-driven control flow and replace it with explicit checks plus event-driven FFI caching. ## Quick Start Ask the AI to review your tick callback or high-frequency event handler for Python 2.7 performance issues using this optimization guide.

Frequently Asked Questions about python27-perf-optimizer

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I optimize Python 2.7 code in tick callbacks?▼

Follow the six-step checklist: replace try/except control flow with explicit if checks, cache deep imports at module level, order branches by hit rate, use tuple dict keys, prefer for loops or next() with sentinel, and cache FFI results with event-driven invalidation.

How to speed up repeated imports in Python 2.7?▼

Cache the imported module in a global variable inside a wrapper function instead of repeating import statements. Benchmarks show cached imports of xml.etree.cElementTree drop from 3.105s to 0.578s per 10 million calls.

Why is try/except slow in Python hot paths?▼

Triggering an exception forces Python to build the exception object and collect a stack traceback, which costs far more than an if check. In tick loops firing every frame, this overhead compounds into measurable frame drops.

Should I use next() or try/except StopIteration for generators?▼

Use a for loop whenever possible since it handles StopIteration in C. When manually advancing an iterator, use next(it, sentinel) which takes 1.876s versus 4.398s for try/except StopIteration per 10 million iterations in Python 2.7.

When should I not apply these micro-optimizations?▼

Only optimize hot paths such as tick callbacks, high-frequency events, and large loops. Non-hot-path code should prioritize readability, and every optimization should be confirmed with benchmark measurements before adoption.