[HBASE-12615] Document GC conserving guidelines for contributors

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: documentation
• Hadoop Flags: Reviewed
• Assignee: M Linville
• Reporter: Andrew Kyle Purtell
• Created: 02/Dec/14 20:24
• Updated: 17/Jun/22 18:25
• Resolved: 07/Oct/15 02:00

Description

LinkedIn put up a blog post with a nice concise list of GC conserving techniques we should document for contributors. Additionally, when we're at a point our build supports custom error-prone plugins, we can develop warnings for some of them.

Source: http://engineering.linkedin.com/performance/linkedin-feed-faster-less-jvm-garbage

• Be careful with Iterators
• Estimate the size of a collection when initializing
• Defer expression evaluation
• Compile the regex patterns in advance
• Cache it if you can
• String Interns are useful but dangerous

All good advice and practice that I know we aim for.