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Tomasz currently works at Datastax, building products around one of the world's favorite distributed databases - Cassandra. He contributes to Java-Driver, Cassandra-Quarkus, Cassandra-Kafka connector, and Stargate.

Published author of "Software Mistakes and Tradeoffs: Making good programming decisions" that is focusing on real-world problems you may encounter in your production systems. It tries to analyze every situation in a variety of contexts and consider all its tradeoffs. It also presents some non-obvious mistakes that may significantly impact your systems from various perspectives (not only correctness).

It is available at :
Software Mistakes and Tradeoffs

Previously worked at Allegro, working on streaming, batch, and online systems serving millions of users.

Check out:

02.11.2021

Mistakes and Trade-offs when optimizing the hot-path

When premature optimization becomes early optimization

LOCATION: Online
KEYWORDS: Methods, Tools, Lessons learned, Architecture

AGENDA:18:00-19:30 h: Talk incl. Q/A

SPEAKER: Tomasz Lelek   COMPANY: Datastax
RECORDING: jug.ch YouTube-Channel

When we are building our systems, the performance requirements are essential.

Having SLA’s data, we can build performance tests in a way that allows us to reason about the system before production deployment. An important observation related to many systems is that the code that brings most of the business value often occupies a small percentage of the whole codebase. This observation is based on the Pareto principle and was validated in many business domains, not only software engineering.

Based on those observations, we can design a process that allows us to find the hot-path in our code. Hot-path is executed for almost all users’ requests. When we detect the hot-path in our code, we can optimize a small subset of our codebase, achieving substantial performance gains. Therefore, we can work more effectively. This presentation will focus on analyzing a system and applying a method based on the Pareto principle, SLA, and performance tests to find and optimize the hot path. Each step will be backed up with performance tests and data to verify that we are progressing with our optimizations in a good direction.

This event will be broadcast live on the Internet. You do not need to install any software or plugins, everything runs in your web browser.

LEVEL OF TALK: Intermediate
LANGUAGE: Talk: en / Slides: en

Tomasz currently works at Datastax, building products around one of the world's favorite distributed databases - Cassandra. He contributes to Java-Driver, Cassandra-Quarkus, Cassandra-Kafka connector, and Stargate.

Published author of "Software Mistakes and Tradeoffs: Making good programming decisions" that is focusing on real-world problems you may encounter in your production systems. It tries to analyze every situation in a variety of contexts and consider all its tradeoffs. It also presents some non-obvious mistakes that may significantly impact your systems from various perspectives (not only correctness).

It is available at :
Software Mistakes and Tradeoffs

Previously worked at Allegro, working on streaming, batch, and online systems serving millions of users.

Check out:

LEVELS:

BEGINNER
The presented topic is new to the audience or only little and superficial experience exists. This talk will mainly cover basic aspects of the topic and not go into much detail.

INTERMEDIATE
The presented topic is known to the audience, serious practical experience is expected. This talk might cover some basic aspects of the topic, but will as well go into depth and details.

ADVANCED
The presented topic is well-known to the audience, serious practical experience and a deep understanding are required. This talk will not cover basics of the topic, but will go into depth, might discuss details, compare different approaches, and so on.

ALL
The topic presented is of interest to all levels and does not require any special prior knowledge.

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JUG Switzerland aims at promoting the application of Java technology in Switzerland.

JUG Switzerland facilitates the sharing of experience and information among its members. This is accomplished through workshops, seminars and conferences. JUG Switzerland supports and encourages the cooperation between commercial organizations and research institutions.

JUG Switzerland is funded through membership fees.

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