# jvm - Paul Piper

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# JVM DIRECTORY

2 ENTRIES • TAGS • OPERATIONAL

2026.10.05 → [THE JVM TAUGHT US TIERED COMPILATION](https://www.paul-piper.de/posts/tiered-compilation-jvm-vs-julia/)

I spent fifteen years tuning JVMs for banks, retailers and insurers, and it took building a Julia plugin to notice how much of that tuning HotSpot does for you before you ever touch a flag. The problem HotSpot solves is the one every JIT has: interpreted code starts instantly and runs slow, compiled native code starts slow and runs fast. You cannot have both from the first line. HotSpot’s answer, tiered compilation, has been the default since Java 7, and it works by never picking just one option.

2026.09.07 → [JAVA 17 RUNS OUT OF PREMIER SUPPORT THIS MONTH](https://www.paul-piper.de/posts/java-lts-cadence-enterprise-consulting/)

Java 17’s Premier Support runs out on 30 September 2026, according to endoflife.date, and in fifteen years of walking into large Java codebases I have never once seen a date like that be the actual reason a company moved. I spent that time as an enterprise Java consultant, in places like a bank’s core ledger, an airline’s distribution system, a public administration’s case management platform. Every one of them had a support calendar pinned to a wall or a wiki page somewhere.

Background

Education

EBS Business School, SFSU, HSG

Experience

20 Years Enterprise Systems

Built

[Scipio ERP - ERP & Ecommerce System](https://scipioerp.com)

Author

["Start/Up - Set the net on fire"](https://www.amazon.com/dp/B0DDKYNNSJ)

JetBrains

5x Plugins Published

Tech Stack

Languages

Java, Python, JS, TS, Rust, Go, Swift, PHP

Frontend

React, Vue, Angular, HTML/CSS

Databases

PostgreSQL, MySQL, MongoDB

Caching

Redis, Memcached

Key Clients

Enterprise

L'Oréal, Amadeus, Konica Minolta, Orange

Digital

1&1 Internet, Sedo.com, Creditsafe

Public

DRK, Kanton Basel, Aktion Mensch, Börsenverein

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