在Golang中快速读取文件

Question

I have a very large file and i need to process each line (each line of file is independent). How can I use goroutines (or should I not use them?) to read the file in the fastest way?

Answer 1

As long as your hard disk is orders of magnitude slower than your CPU, which is still a quite common situation, then you cannot magically make the file reading (domain: from a single HD) any faster by throwing more CPU cycles onto it. (Assuming cold file caches and/or file size much bigger then all available file cache memory).