Zero-Allocation-Hashing
HikariCP
| Zero-Allocation-Hashing | HikariCP | |
|---|---|---|
| 1 | 33 | |
| 765 | 19,424 | |
| 0.3% | - | |
| 1.8 | 6.2 | |
| 21 days ago | about 1 month ago | |
| Java | Java | |
| Apache License 2.0 | Apache License 2.0 |
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Zero-Allocation-Hashing
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Hash, displace, and compress: Perfect hashing with Java
...sounds like quite a niche use-case, but I agree that I cannot think of any other stream-hashing library. I hoped https://github.com/OpenHFT/zero-allocation-hashing would do, but it doesn't. However, https://github.com/OpenHFT/Chronicle-Bytes has xxHash if that's your thing.
HikariCP
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Java virtual threads caused a deadlock in TPC-C for PostgreSQL
Looks like HikariCP is also awaiting fixes for this https://github.com/brettwooldridge/HikariCP/pull/2055
- About Pool Sizing
- HikariCP maximumPoolSize based on AWS ECS number of tasks
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Writing to db
I have used hikari and exposed to do this in the past with postgres, although other dialects are supported.
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A Tale of Two Connection Pools
I found one suggestion from the author of HikariCP on how to address this, which I implemented and it worked. However, there are additional classes involved, and it feels a little clunky and hard to follow.
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Spring boot change password runtime
Not really, you can change some things in spring boot but doing so will typically trigger a refresh which is less reliable than restarting but still causes a large performance hit. You could probably do it with hikari if you really needed to but it's inadvisable to build your application around this mechanic.
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Help with bungeecord server
# https://github.com/brettwooldridge/HikariCP/wiki/About-Pool-Sizing
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Currently load testing a Django API I don’t get good results, Help me brainstorm this
Not familiar with Python but this thread about a Java connection pool might be interesting: https://github.com/brettwooldridge/HikariCP/wiki/About-Pool-Sizing
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Should I use diesel ORM if performance is the most important thing?
Whatever you choose, presuming your app is database heavy, I highly recommend spending time on DB schema design to make all queries as short as possible, avoid relying on transactions, and keep your connection pool tiny. For reference: https://github.com/brettwooldridge/HikariCP/wiki/About-Pool-Sizing
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Art of README
You reminded me of the HikariCP library and it’s documentation: Clear and simple with references to other libraries trying to accomplish the same thing. It is not in the closure space though.
https://github.com/brettwooldridge/HikariCP
What are some alternatives?
hash-checker - Fast and simple application that allows you to generate and compare hashes from files and text
c3p0 - a mature, highly concurrent JDBC Connection pooling library, with support for caching and reuse of PreparedStatements.
password4j - Java cryptographic library that supports Argon2, bcrypt, scrypt and PBKDF2 aimed to protect passwords in databases. Easy to use by design, highly customizable, secure and portable. All the implementations follow the standards and have been reviewed to perform better in the JVM.
spring-boot-r2dbc - An example implementation of Spring Boot R2DBC REST API with PostgreSQL database.
hash4j - Dynatrace hash library for Java
Vibur DBCP - Vibur DBCP - concurrent and dynamic JDBC connection pool
Chronicle-Bytes - Chronicle Bytes has a similar purpose to Java NIO's ByteBuffer with many extensions
JDBI - The Jdbi library provides convenient, idiomatic access to relational databases in Java and other JVM technologies such as Kotlin, Clojure or Scala.
minperf - A Minimal Perfect Hash Function Library
Flyway - Flyway by Redgate • Database Migrations Made Easy.
argon2-jvm - Argon2 Binding for the JVM
jOOQ - jOOQ is the best way to write SQL in Java