Python 3.13 Changes [upd] May 2026

print(f"Old asyncio: old_time:.3fs") print(f"New asyncio: new_time:.3fs") print(f"Speedup: (old_time/new_time - 1)*100:.1f%") 4. Enhanced pathlib.Path Methods Path operations become more intuitive with new methods.

# SHA3-256 is now as fast as SHA-256 sha3_hash = hashlib.sha3_256(data).hexdigest() print(f"SHA3-256: sha3_hash[:16]...") python 3.13 changes

# List comprehension performance list_time = timeit.timeit( "[i * 2 for i in range(1000)]", number=100000 ) print(f"List comprehensions: list_time:.3fs") print(f"Old asyncio: old_time:

# With cache (now faster decorator execution) start = time.perf_counter() result_cached = fibonacci_cached(n) cached_time = time.perf_counter() - start python 3.13 changes

print("✓ Running Python 3.13+")

import sys import time from functools import lru_cache Run with: PYTHON_JIT=1 python script.py def fibonacci(n): """Classic recursive function - JIT helps here""" if n <= 1: return n return fibonacci(n-1) + fibonacci(n-2) Decorators are faster @lru_cache(maxsize=None) def fibonacci_cached(n): if n <= 1: return n return fibonacci_cached(n-1) + fibonacci_cached(n-2)

def benchmark_fibonacci(): n = 35