I have a situation where I have some HTML I am selecting elements from using the ".class tag" selector combination using jQuery v1.3.2. I have noticed that in both IE8 and Firefox 3.0.10 this particular scenario is painfully slow to execute. From profiling in both browsers it appears that the Sizzle engine is making an *enormous* amount of calls to both the isXML and filter functions.
If I upgrade the version of Sizzle to v1.0 then these selectors work incredibly fast as I would have expected. Profiling in both browsers reveals that the amount of calls to the isXML and filter functions come down from numbers around 80k+ to a few hundred. My specific example can be found here: http://grubersauce.com/walker/jquery_test.html Does anyone have any guidance as to why this would be so slow in jQuery 1.3.2 using the Sizzle v.0.9.3 engine? Is it safe to upgrade the Sizzle version to v1.0 while using jQuery v1.3.2?
