[OAK-8185] Improve CompositeNodeStore fixture

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.10.3, 1.14.0
• Component/s: benchmarks
• Assignee: Tomek Rękawek
• Reporter: Marcel Reutegger
• Created: 01/Apr/19 08:01
• Updated: 11/Jun/19 10:52
• Resolved: 16/Apr/19 11:05

Description

While working on OAK-8141 I noticed the benchmark numbers for GetDeepNodeTest on Oak-Composite-Store are rather low compared to Oak-Segment-Tar.

Apache Jackrabbit Oak 1.12-SNAPSHOT
# GetDeepNodeTest                  C     min     10%     50%     90%     max       N 
Oak-Segment-Tar                    1      35      37      39      41      64    1524
Oak-Composite-Store                1     203     204     208     214     236     288

In an offline conversation tomek.rekawek mentioned the overhead shouldn't be that big because the implementation should switch to the non-composite implementation as soon as the read operation traverses into the global/writable node store. It seems however, this is not the case when running GetDeepNodeTest. So, this may well be a bug and not an improvement, as filed at the moment.