Category Archives: Miscellaneous

Performance impact of MySQL performance-schema-instruments

Hi, there! I’m Otsuka (tom__bo), mainly responsible for MySQL operations and development of various DB administration and verification tools. In this post, I am going to write about my experiment on MySQL performance when its performance consumers, namely the performance_schema database and the innodb_metrics table of the information_schema database, are up and running.  I got to learn about the performance_schema and the INFORMATION_SCHEMA.INNODB_METRICS from a book …

Make your GitHub contributions calendar greener (featuring Armeria Sprint)!

Hi, there! Do any of you need to make lots and lots of commits to turn your GitHub contribution calendar into a pastureland? If that’s the case, I proudly present Armeria Sprint! Let me give you some ideas on what Armeria Sprint is and share reviews from our enthusiastic participants. You’ve probably come across a sprint at technical …

Announcing the LINE API Experts for 2019

LINE API Expert is a program to recognize and award the title of “LINE API Expert” to competent engineers who have a deep understanding of the APIs provided by LINE and are influential in the developer community. LINE API experts will be offered an array of benefits as well as LINE’s support for their activities. …

Thank you for contributing to Armeria!

Hello to the readers! I’d like to share with you the first ever Armeria Contributor Reward Event and how it went. For this posting, I’m not going to elaborate on the technical aspects of Armeria. To learn more about its technology and features, please visit the official website for Armeria. The Armeria project was initially developed by LINE but …

EuroSTAR Conference 2018

What is EuroSTAR Conference 2018 EuroSTAR is an annual Software Testing Conference hosted in Europe, in November. The topics of the conference covered vary from improving software development process, like DevOps and Agile, or AI related automation testing, and also the mindset building-up to overcome recognization biases. For the details of this yearly Software Testers Festival, …

TensorFlow.js

Greetings! This is Jun and I’m a front-end developer at LINE. Recently the front-end development scene is booming with new technologies and it’s becoming difficult to catch up with all those new things. Personally I’m onto machine learning (ML). As part of today’s topic as “implementing machine learning in front-end web development”, let me share …

Wrapping a native SDK for Unity: our challenges and choices

I am Wei Wang from the LINE SDK development team. Last year at LINE Dev Day 2018, we released our new open source LINE SDK for iOS and Android. The SDK provides a modern way to integrate LINE Login and several APIs into your app, helping you create an engaging and personalized user experience. In addition to app …

LINE의 OpenJDK 적용기: 호환성 확인부터 주의 사항까지

2018년 오라클의 라이선스 체계가 변경되면서 2019년 1월 이후 더 이상 무료로 Oracle JDK를 사용할 수 없게 되었습니다. 이에 LINE 내부에서는 사전에 OpenJDK를 적용하기 위해 필요한 사항이나 검토 항목을 정리하기 위하여 TF(task force)를 구성하였고, 진행된 내용과 사용된 기술적인 사항들을 정리하고자 이 글을 작성하게 되었습니다.