Simple cache implementation would benefit from having a configurable parameter that would flush the cache in certain time intervals.
Right now, the cache is flushed only after content is published (after 30 sec) but there are cases when flushing cache is benefitial (server side dynamic content, for example).
Setting this interval to 0 (zero) could preserve the current behaviour otherwise cache is to be flushed every time the configured counter reaches the number of seconds....