Formula taking exponentially longer to parse

[philhawthorn]

Hi,

The following formula:

IF(INCLUDES( Account__r.Field__c , "a"), "a ", NULL)

Parses in a few MS. However, if I add e.g. 15 more conditions:

IF(INCLUDES(  Account__r.Field__c , "a"), "a ", 
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ",
IF(INCLUDES(  Account__r.Field__c , "a"), "a ", NULL))))))))))))))))

It takes ~2 seconds. And then adding 1 more takes 4 seconds, then 1 more 8, 16 etc etc. The actual formula I have is 37 :(

Thanks

[philhawthorn]

I just noticed 1015 which looks the same issue