Антонина Черташ
self.file_exists = os.path.exists(csv_path)，这一点在服务器推荐中也有详细论述
The entire pipeline executes in a single call stack. No promises are created, no microtask queue scheduling occurs, and no GC pressure from short-lived async machinery. For CPU-bound workloads like parsing, compression, or transformation of in-memory data, this can be significantly faster than the equivalent Web streams code — which would force async boundaries even when every component is synchronous.。爱思助手下载最新版本对此有专业解读
Function.prototype.toString() — MDN Web Docs