On Jan 15, 2009, at 4:25 PM, [email protected] wrote: > OK, I'm confused about the time procedure. What's the difference > between > sage: time s = 2^3021377-1 > CPU time: 0.00 s, Wall time: 0.00 s
The variable s now holds the integer 2^3021377-1, represented internally in binary. > and > sage: time k = str(s) > CPU time: 0.67 s, Wall time: 0.67 s k now holds the string (decimal) representation of s, as a python string object (essentially a char* under the hood). This is much harder to compute (the internal format is not decimal), and took nearly a second on his machine. If I were to write sage: 2^3021377-1 it would first compute the value, then turn it into a string for printing. The above separates the two steps. Hope that helps clarify things. - Robert --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sage-edu" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-edu?hl=en -~----------~----~----~----~------~----~------~--~---
