1. Caching for Performance Jeff Tapper Tapper.net Consulting

2. Agenda What is Caching Why is Caching important Where can I implement caching What to Cache within CFMX How to Cache within CFMX Summary

3. What is Caching A Cache is a place where something is temporarily stored By storing frequently used items, the need to recreate them is mitigated

4. Why is Caching Important Each operation a server performs takes time / resources By reducing the number of operations any server performs, we increase the ability for that server to handle more requests Faster Page Loads Increased Scalability

5. Places to Cache Database ColdFusion Web Server Network

6. Places to Cache Network Diagram

7. What to Cache in CFMX Data CFC instances Webservices Pages Content

8. What to Cache in CFMX Data Caching common queries can greatly increase speed pages are built Reduces network traffic between CFMX and Database

9. What to Cache in CFMX CFCs CFCs are the new core building block of CFMX applications Instantiation of CFCs is an expensive (slow) process

10. What to Cache in CFMX Webservices Calling a webservice invokes a complex process. Requests WSDL, parses it, makes calls to methods Caching WSDL reduces over all processing time 3-5x

11. What to Cache in CFMX Pages Many applications have entire pages which do not change frequently Caching the entire page can reduce time needed by CFMX In some cases, pages can be cached as HTML, removing the need for CFMX to process it at all

12. What to Cache in CFMX Content Often, even in pages which are not static, many sections of the page are. Caching the static parts of the page reduces the time CFMX needs to build the page.

13. Data Caching in CFMX Cached Within Cached After Storing query in shared scope variables

14. Data Caching in CFMX Benefits Great for dynamic queries Easy to implement Built in Timeout Drawbacks Purging non-trivial Using CFQUERY attributes to Cache

15. Data Caching in CFMX Benefits Easy to Manage Not limited by “Max Number cached queries” Drawbacks Not well suited for dynamic queries More Complex implementation Lacks built-in timeout Query Caching in a shared scope

16. CFC Caching in CFMX Storing instances in shared scope variables Page Context Bug

17. Webservice Caching in CFMX CFMX automatically caches WSDL

18. Page Caching in CFMX Trusted Cache CF_SuperCache Custom Built Solutions

19. Caching content in CFMX CFCACHE CFSAVECONTENT

20. Summary Effective use of caching can greatly extend the scalability of an application Every application offers a myriad of caching possibilities Caching opportunities exist both within and outside the CFMX server

21. Questions ?