- Cost of Code
- CPU time Limit
- Benchmarking technique for Code
- Benchmarking technique for Declarative
Speaker : Purushottam Bhaigade
Date : Saturday, DEC 07, 2019 10:00 AM EST ( 8:30 PM IST)
- Script limit – Total number of line of Apex code executed
- Separate limits for each Managed Package (Aloha)
- Trigger Context – 200,000 lines
- Async (Batch & Future) – 1,000,000 lines
- Workflow, Process Builders, Formulas has no limits at all
What Changed after Winter’14 ?
Script Limit were changed to calculate CPU Time usage
Why Software Benchmarking is hard?
- Time measurement can’t trusted always, because system performance varies based on time of day and momentary load.
- Debug log cost CPU time
- You don’t have control on background operations like garbage collection
- Result might change with each patch release
- Assignment from static field reference is 20x time slower than variable assignment
- Assignment from dynamic field reference is 30x time slower than static assignment
- Use temporary variable instead of referencing a field multiple times!
- The cost of sending email notifications via Workflows can add up 15 ms/email (10 field merge
template). Ultimately that is 3 seconds for 200 records !
- What is Alternative then? Create task for user – only 0.5 ms per record (tested with basic formula workflow)
- Validation Rules : Each validation formula function takes about 30 microseconds. Example : 10 validation rules, each with 10 functions, applied to 200 records = 600 ms
How to prevent this?
- Use Limits.getCPUTime() to find out you are getting into trouble, then either exit or go async if you are getting close
- Learn more advance architectures to detect reentrancy
- Try to use Platform event in your solution for Async operation
- Accept that you still may get the blame
Here is recording of session:-
Here is PPT of session:-Apex code Benchmarking from Amit Chaudhary
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Amit Chaudhary is Salesforce Application & System Architect and working on Salesforce Platform since 2010. He is Salesforce MVP since 2017 and have 17 Salesforce Certificates.
He is a active blogger and founder of Apex Hours.