Webgrind is an Xdebug profiling web frontend in PHP5. It implements a subset of the features of kcachegrind and installs in seconds and works on all platforms. For quick'n'dirty optimizations it does the job. Here's a screenshot showing the output from profiling:
It is possible that a larger number of kcachegrind features will be implemented in the future, bringing webgrind closer to completing one of the suggested PHP Google Summer of Code 2008. At this point nothing has been planned, though.
Suggestions for improvements and new features are more than welcome - this is just a start.
Mailing list is available through the webgrind google group.
See the Installation page on Google Code for more