如何在Python中优化大文件搜索

def search_file(file_path, keyword):
    with open(file_path, 'r') as file:
        lines = (line for line in file if keyword in line)
        for line in lines:
            print(line)

import concurrent.futures

def search_file(file_path, keyword):
    def search_in_chunk(chunk):
        results = []
        for line in chunk:
            if keyword in line:
                results.append(line)
        return results

    with open(file_path, 'r') as file:
        lines = file.readlines()
        chunk_size = len(lines) // num_threads
        chunks = [lines[i:i+chunk_size] for i in range(0, len(lines), chunk_size)]

    with concurrent.futures.ThreadPoolExecutor() as executor:
        results = executor.map(search_in_chunk, chunks)

    for result in results:
        for line in result:
            print(line)

import re

def search_file(file_path, pattern):
    with open(file_path, 'r') as file:
        for line in file:
            if re.search(pattern, line):
                print(line)