Performance bottleneck caused by _registerFont function

hello，i meet a Performance bottleneck problem caused by the function _registerFont but i dont know why this function use too much cpu cost and i dont know why i invoked this function，because im sure im not use this function in my project，i just use loadImage createCanvas Image these three function，so i guess maybe these functions invoke _registerFont？am i right？please tell me

Start by reproducing the reported CPU usage around _registerFont while using loadImage, createCanvas, and Image. Trace whether those calls invoke _registerFont and identify the cause of the bottleneck; done means the invocation path and performance behavior are explained with a focused fix or follow-up.

Written by the indexing model from the issue text.