How can dereferencing the first character take longer when the string is longer?

Article URL: https://blogs.msdn.microsoft.com/oldnewthing/20181205-00/?p=100405

Comments URL: https://news.ycombinator.com/item?id=18732142

Points: 10

# Comments: 1

from Hacker News: Front Page http://bit.ly/2Gx9OQH
via