Hi,

I have an umbraco page which contains 15 Macros, and is loading slowly. I looked at the stack trace and noticed that 3 of the macros are taking a (relative) age to load from cache. All of these macros have the Cache By Page attribute ticked, but the Cache Period is set to 0 seconds (I believe this is the default, I didn't create the Macros personally). I have tested Macro Caching, but as the controls are dynamic they didn't work.

Here is the trace, shortened to just the Macro Loaded from Cache lines for the 15 macros:

umbracoMacro  Macro
loaded from cache (ID: 22, [XSLT] Code References)       0.00268897818445016    0.000058

umbracoMacro  Macro
loaded from cache (ID: 23, [XSLT] Header Logo)              0.00362242184665183    0.000058

umbracoMacro  Macro
loaded from cache (ID: 19, [XSLT] Header contact)           0.554382212733769       0.000079

umbracoMacro  Macro
loaded from cache (ID: 13, [UserControl] Agent info)        0.559541303250158       0.000057

umbracoMacro  Macro
loaded from cache (ID: 54, [UserControl] Mini basket)       0.560212107889346       0.000108

umbracoMacro  Macro
loaded from cache (ID: 17, [XSLT] Header navigation)      0.561118289313779       0.000156

umbracoMacro  Macro
loaded from cache (ID: 48, [XSLT] Header progress bar)   0.572873305469534       0.000054

umbracoMacro  Macro
loaded from cache (ID: 20, [UserControl] Flight search)     0.593674392887244       0.000109

umbracoMacro  Macro
loaded from cache (ID: 21, [UserControl] Car search)        1.13831208350692         0.537159

umbracoMacro  Macro
loaded from cache (ID: 34, [UserControl] Hotel search)     1.14266789794708         0.000329

umbracoMacro  Macro
loaded from cache (ID: 55, [UserControl] Holiday search)  1.81846651832426         0.672293

umbracoMacro  Macro
loaded from cache (ID: 61, [XSLT] Carousel)                    2.49171592748245         0.667841

umbracoMacro  Macro
loaded from cache (ID: 62, [XSLT] Side Offers)                3.16027124006704         0.000059

umbracoMacro  Macro
loaded from cache (ID: 63, [XSLT] Offer Panels)              3.7988588257655           0.000058

umbracoMacro  Macro
loaded from cache (ID: 12, [XSLT] Footer)                       3.80130205983485         0.000056

As you can see 3 of the macros are taking over half a second each, while the other 13 are taking only 0.001181 seconds combined.

What is actually happening during the "Macro loaded from cache" line in the trace? Is it loading it from the in memory cache? Is it actually doing something more underneath?

And why would 3 macros take so long to load?

Thanks,

Iain