Dane Wu

Senior Rails engineer focused on high-concurrency systems & database performance. 6+ yrs. Open to remote roles. Based in Taiwan 🇹🇼

Taiwan Joined on Dec 4, 2018 srichsun@gmail.com https://github.com/srichsun

Dane Wu

Jun 29

You've Tuned the Queries and It's Still Slow — Now Change the Data Model

#rails #performance #database #postgres

7 min read

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Dane Wu

Jun 28

The Code Is Fine, but Requests Queue Until They Time Out: Puma, Pools, CDN

#rails #performance #puma #postgres

4 min read

Dane Wu

Jun 28

Your SQL Is Fast but the API Is Slow: It's the Ruby Layer

#rails #performance #ruby #webdev

4 min read

Dane Wu

Jun 28

One Notification Email Made Our Checkout API 3 Seconds Slower

#rails #performance #ruby #sidekiq

5 min read

Dane Wu

Jun 27

We Added a Cache; Three Days Later It Took the Database Down at Peak

#rails #performance #caching #redis

5 min read

Dane Wu

Jun 27

The Fastest Query Is the One You Never Run: The Four Layers of Rails Caching

#rails #performance #caching #redis

6 min read

Dane Wu

Jun 26

ActiveRecord: You Wanted a Number, but Loaded 500,000 Rows Into Memory

#rails #performance #database #ruby

6 min read

Dane Wu

Jun 25

A 1000x Speedup From One Index — and Why It Sometimes Does Nothing

#rails #database #sql #performance

7 min read

Dane Wu

Jun 25

From 8s to 1s: Truly Understanding Rails N+1 by Opening Up ActiveRecord

#rails #activerecord #performance #sql

10 min read

Dane Wu

Jun 21

Diagnosing a slow Rails page, layer by layer

#rails #performance #postgres #database

4 min read

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You've Tuned the Queries and It's Still Slow — Now Change the Data Model

Want to connect with Dane Wu?

The Code Is Fine, but Requests Queue Until They Time Out: Puma, Pools, CDN

Your SQL Is Fast but the API Is Slow: It's the Ruby Layer

One Notification Email Made Our Checkout API 3 Seconds Slower

We Added a Cache; Three Days Later It Took the Database Down at Peak

The Fastest Query Is the One You Never Run: The Four Layers of Rails Caching

ActiveRecord: You Wanted a Number, but Loaded 500,000 Rows Into Memory

A 1000x Speedup From One Index — and Why It Sometimes Does Nothing

From 8s to 1s: Truly Understanding Rails N+1 by Opening Up ActiveRecord

Diagnosing a slow Rails page, layer by layer