Kafka, Scala, JVM, distributed systems, performance, machine learning, Haskell, @ConfluentInc.
Joined December 2008
- Tweets 12,044
- Following 512
- Followers 4,619
- Likes 4,249
22 Photos and videos
May 13
Nice wins from Shenandoah late barrier expansion "Our expectation was that LBE would be most impactful on C2 compilation times. We are indeed seeing up to 30% faster compilations. However, LBE also dramatically improves application performance directly."
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May 12
Nearly 12 years after Valhalla was initially announced, a pull request that implements the first preview of JEP 401: Value Classes and Objects has been submitted to the main OpenJDK repo.
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May 12
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Apr 29
Significant `HashMap.putAll` improvement by adding a fast path for a couple of common cases.
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Apr 2
I think many are surprised that multi-array allocations are very slow in OpenJDK, the following PR fixes part of it: github.com/openjdk/jdk/pull/…
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Ismael Juma retweeted
Mar 30
QuestDB has a custom JIT: Java serialized SQL filters into Intermediate Representation and the IR is picked up by C backend, which generates native code: Scalar or AVX-2.
I prototyped a pure Java backend: It consumes the same IR, but generates Java classes with Vector API 🧵
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Ismael Juma retweeted
Mar 24
io_uring easily beats AIO and gets faster with every kernel — until both suddenly get 30% slower.
Join a database developer’s unexpected journey into the Linux kernel and IOMMU.
medium.com/ydbtech/how-io-ur…
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Ismael Juma retweeted
Mar 5
If you want to learn more about how we got a Quarkus REST app to start in 80ms on the JVM, have a look at the very detailed blog post we wrote with @geoand86 about Quarkus Project Leyden. quarkus.io/blog/leyden-2/
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Ismael Juma retweeted
With the recent #ApacheKafka 4.2 release, the new "streams" rebalance protocol is production ready. It's exciting that it's also GA on Confluent Cloud now.
The cherry-on-top is, that our #KafkaStreams Cloud UI now also shows task assignment information for "streams" groups. \1
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Ismael Juma retweeted
Mar 3
Optimizing Recommendation Systems with JDK's Vector API
I think this is maybe our first prod usage of Vector API, works great.
netflixtechblog.com/optimizi…
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Microsoft .NET On Linux Patches Use IO_uring For Massive Performance Benefits
phoronix.com/news/Microsoft-…
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Ismael Juma retweeted
Feb 10
SwissTable, a high-performance open-addressing hash map originally developed by Google, is becoming more popular in the industry.
First, Rust adopted it for its HashMap type. Then Go started using a custom version of SwissTable for its map type.
Now, Valkey (a Redis fork) has rewritten its core hash table data structure, switching from the old chained implementation to SwissTable.
Pretty cool!
valkey.io/blog/new-hash-tabl…
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Ismael Juma retweeted
Extending Records to handle the richer semantics of Classes without losing the benefits of Records. A careful balancing act 🙂
openjdk.org/projects/amber/d…
"Java for the AI world"
#java #openJDK #AI
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