input: Write a function to optimize a Flask application for efficient performance.
  
  from flask import Flask, request, jsonify
  
  app = Flask(__name__)
  
  @app.route('/api/<endpoint>', methods=['GET', 'POST'])
  def process_request(endpoint):
      # Performance optimization
      # Use Redis for caching session and query performance
      # Use uWSGI for Python applications
      # Use gunicorn as WSGI server
      # Use Flask-Compress extension for compression
      # Use global variables where applicable
      # Don't use sql queries directly, always use model methods
      # Use query parameter in URLs instead of plain parameters
      # Use thread-local objects for performance
  
      # Your code here
  
  assert process_request('/api/user', methods=['GET'])==True
  assert process_request('/api/product', methods=['POST'])==True
  assert process_request('/api/order', methods=['GET'])==True
  assert process_request('/api/customer', methods=['POST'])==True
output: 
  from flask import Flask, request, jsonify
  import redis
  from flask_compress import Compress
  import threading
  
  app = Flask(__name__)
  Compress(app)
  
  redis_client = redis.StrictRedis(host='localhost', port=6379, db=0)
  thread_local = threading.local()
  
  @app.route('/api/<endpoint>', methods=['GET', 'POST'])
  def process_request(endpoint):
      # Use Redis for caching session and query performance
      cache_key = f"cache_{endpoint}_{request.method}"
      cached_response = redis_client.get(cache_key)
      if cached_response:
          return jsonify(cached_response)
  
      # Use global variables where applicable
      global thread_local
      if not hasattr(thread_local, 'counter'):
          thread_local.counter = 0
      thread_local.counter += 1
  
      # Use query parameter in URLs instead of plain parameters
      query_params = request.args.to_dict()
  
      # Use model methods instead of direct SQL queries
      result = model_method(endpoint, query_params)
  
      # Cache the result in Redis
      redis_client.set(cache_key, result, ex=3600)
  
      return jsonify(result)
  
  def model_method(endpoint, params):
      # Simulate a model method
      return {
          'endpoint': endpoint,
          'params': params,
          'counter': thread_local.counter
      }
  