Hi everyone,
Currently we use QCache container that remember the size, layout or line
breaking points of some strings from the document. Basically, a key is
mapped to an object.
However currently the key contains the strings, which means that
globally all the document is duplicated as cache keys. This is quite a
waste.
What would be a good way to replace the string by a good enough signature?
* qHash is designed to have some collisions (which are handled by the
container); this is not good.
* boost::crc can be used too, but it is supposed to do something else
* would using a sha1 or a md5 make sense?
* I could do fancy things, but I'd rather avoid to import a whole
library for this.
I am not looking for something that is strong against malicious attacks,
but rather something that is fast and works in practice.
Ideas?
JMarc
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