I use Safari as my browser, but I've found that it frequently hangs for 20, 30 seconds (sometimes longer), often times when I wake it up from sleep and/or when I open a new tab.
Though I'm not sure it would be helpful, the next time it does it I'll see if I can sample the process and report back with the results. In the meantime, is there something I can try? I'm running on a mid-2007 MacBook so, while I think I have enough processing power (2x2.16Ghz) and memory (2GB), I suspect it's a disk issue.
Is there something I can do to reduce disk usage? Should I clear my cache (this isn't a problem), my history (I want to keep this if possible) or both?
edit: Is there any way to determine what plugins I have installed? I have RescueTime and Evernote, so either of them could be the culprit, but I know that there are programs that like to install hidden extensions, so that could be the problem as well.
By the way, here's that sampling output summary - I've cut out the call tree as it was way too long to post:
Total number in stack (recursive counted multiple, when >=5): 21 _pthread_start 21 thread_start 7 __semwait_signal 7 mach_msg 7 mach_msg_trap 7 pthread_cond_wait$UNIX2003 6 CFRunLoopRunSpecific 5 CFRunLoopRunInMode Sort by top of stack, same collapsed (when >= 5): __semwait_signal 2058 mach_msg_trap 2030 semaphore_wait_signal_trap 589 select$DARWIN_EXTSN 588 0x0 294 __workq_ops 294 semaphore_timedwait_signal_trap 294 kevent 293 pread$UNIX2003 116 fsync$UNIX2003 50 WebCore::BinaryPropertyListSerializer::appendStringObject(WebCore::String const&) 42 WTF::HashMap<WebCore::String, unsigned long, WebCore::StringHash, WTF::HashTraits<WebCore::String>, WTF::HashTraits<unsigned long> >::get(WebCore::String const&) const 19 write$UNIX2003 19 __dtoa 15 WebCore::IntegerArrayHash::equal(WebCore::IntegerArray const&, WebCore::IntegerArray const&) 13 WebCore::String::characters() const 11 WTF::HashMap<WebCore::IntegerArray, unsigned long, WebCore::IntegerArrayHash, WebCore::IntegerArrayHashTraits, WTF::HashTraits<unsigned long> >::get(WebCore::IntegerArray const&) const 7 __memcpy 7 WebCore::String::isEmpty() const 6 __sfvwrite 6 WebCore::BinaryPropertyListSerializer::addAggregateObjectReference(unsigned long) 5 __vfprintf 5 Sample analysis of process 18283 written to file /dev/stdout