Using advent of code to familiarize myself with golang.

1. Get your inputs for each day on the official website and add them to the respective <year>/<day> directory.
2. go run ./<year>/<day>/ -input=<path to puzzle input>
3. The answers will be printed out on the command line

Inputs are in .gitignore to not expose them as requested by the Advent of Code guy.

• I/O benchmarking blog post. Interesting read on bufio.Scanner vs os.ReadFile. Gist: bufio.Scanner is less performant than os.ReadFile but can read line by line.
• To read a whole file it can be better to use os.ReadFile like in this Stack Overflow answer.
• scanner throws error if line > 65536 characters by default. Configue according to Scanner.Buffer API.

• Benchmarking api.
• Benchmarking funcs measure the whole function, not just the loop. Reset timer after expensive set up
• Blog post on testing and benchmarking.