![30-40% performance difference between single and clustered mode with one worker · Issue #1387 · puma/puma · GitHub 30-40% performance difference between single and clustered mode with one worker · Issue #1387 · puma/puma · GitHub](https://user-images.githubusercontent.com/7026420/29068995-5007bf86-7c39-11e7-93d6-da383052d3e7.png)
30-40% performance difference between single and clustered mode with one worker · Issue #1387 · puma/puma · GitHub
![puma v4 では SIGTERM での worker process ゾンビ化に気をつけよう / Be aware of zombie processes in puma v4 - Speaker Deck puma v4 では SIGTERM での worker process ゾンビ化に気をつけよう / Be aware of zombie processes in puma v4 - Speaker Deck](https://files.speakerdeck.com/presentations/3d361dbb82a64dcdadc71bf3cf855231/slide_21.jpg)
puma v4 では SIGTERM での worker process ゾンビ化に気をつけよう / Be aware of zombie processes in puma v4 - Speaker Deck
![Why puma workers constantly hung, and how we fixed by discovering the bug of Ruby v2.5.8 and v2.6.6 | by Yohei Yoshimuta | ITNEXT Why puma workers constantly hung, and how we fixed by discovering the bug of Ruby v2.5.8 and v2.6.6 | by Yohei Yoshimuta | ITNEXT](https://miro.medium.com/v2/resize:fit:1400/0*EmmhijVk2W4Y2VaM.png)
Why puma workers constantly hung, and how we fixed by discovering the bug of Ruby v2.5.8 and v2.6.6 | by Yohei Yoshimuta | ITNEXT
![Why puma workers constantly hung, and how we fixed by discovering the bug of Ruby v2.5.8 and v2.6.6 | by Yohei Yoshimuta | ITNEXT Why puma workers constantly hung, and how we fixed by discovering the bug of Ruby v2.5.8 and v2.6.6 | by Yohei Yoshimuta | ITNEXT](https://miro.medium.com/v2/resize:fit:1400/1*9B6dynQKf3pkxl8q44y2kw.png)