Simple cache
Infinispan local caches have several features that make it more than just a map - expiration and eviction, listeners, statistics, transactions, cache stores and so forth. However, this comes at a price - due to all the hooks and object allocation, plain ConcurrentHashMap is faster than local cache.
There are applications that need something in between - great performance but some of those features, too. In our case, the motivation were internal caches in Hibernate Second Level Cache. Therefore Infinispan 8.0.1.Final brings the simple cache - alternative implementation of the AdvancedCache interface optimized for maximum performance when you need just the basics.
The table below shows which features are available in simple cache:
| Feature | Availability |
|---|---|
Basic map-like API |
✔ |
Cache listeners (non-clustered) |
✔ |
Expiration |
✔ |
Eviction |
✔ |
Security |
✔ |
JMX access |
✔ |
Statistics |
✔ |
Transactions |
✘ |
Invocation batching |
✘ |
Persistence (cache stores and loader) |
✘ |
Map Reduce Framework |
✘ |
Distributed Executors Framework |
✘ |
Custom interceptors |
✘ |
Indexing (querying) |
✘ |
Compatibility (embedded/server) |
✘ |
Store as binary |
✘ |
Configuring simple cache is as simple as adding one attribute to the XML configuration:
While configuration schema allows to set up the unsupported features, doing so results in an exception when the cache is created.
You can also configure simple cache programmatically:
So, what kind of performance improvement can you expect? We had run basic (single-threaded) benchmark using JMH and this is what we got:
Implementation
get() (operations/s)
put() (operations/s)
ConcurrentHashMap
128,354,135
±
2,178,755
33,980,088
±
28,487
Simple cache
86,969,897
±
738,935
14,044,642
±
14,280
Local cache
17,280,018
±
361,910
2,267,850
±
44,814
This gives us about 5✕ speedup for reads and 6✕ for writes. Your mileage may vary, but it’s certain that simple cache provides substantial performance benefits.
So, if your use-case allows it, try out simple cache and let us know. It’s as simple as one configuration attribute!
Get it, Use it, Ask us!
We’re hard at work on new features, improvements and fixes, so watch this space for more announcements!Please, download and test the latest release.
The source code is hosted on GitHub. If you need to report a bug or request a new feature, look for a similar one on our GitHub issues tracker. If you don’t find any, create a new issue.
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