This is a lovely little utility for streaming data. I have a somewhat related use case:

• my 'window' is time based,
• observations come as pairs with <t_i, x_i>
• your class helps for min(x_i) and max(x_i) for all i
• when adding I also check if the time span between newest and oldest exceeds 'window lengths'
• if so, pop old values

Is there are clever way to use your data structure to update?