On 30.05.12 01:44, Victor Stinner wrote:
The "two steps" method is not promising: parsing the format string twice is slower than other methods.
The "1.5 steps" method is more promising -- first parse the format string in an efficient internal representation, and then allocate the output string and then write characters (or enlarge and widen the buffer, but with more information in any case). The internal representation can be cached (as for struct module) that for a repeated formatting will reduce the cost of parsing to zero.
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