Here's everything we've published on the Speedshop newsletter in 2020:

• What is Response Time? A deep-dive on how to understand response time and why it's different than time-to-first-byte.
• Are APMs too expensive? Should you switch from Datadog or Scout or New Relic to a roll-your-own solution, like statsd?
• The Speedshop Values Things I've come to value over 5 years of performance work.
• Why I'm Investing in Ruby Why I continue to invest in Ruby and Rails, even though it's not as popular as it once was.
• Why I Prefer Minitest Old man shakes fist at current-testing-meme.
• Is Caching Necessary? Do you have to use an application cache, like memcached or Redis, to scale?
• Performance and Code Quality at Startups How does performance work and other software quality work (like testing) change at early stage businesses?
• Test Setup How not understanding your test setup blocks can slow down your suite.
• Can I Switch to Puma? What makes applications thread-safe?
• Rescued Exceptions A silent but deadly killer of Ruby performance - raising and then rescuing exceptions.
• A Local Perf Environment How to modify your local environment to reproduce production perf problems.
• Lazy-loading images How to use the new loading=lazy for a free bandwidth boost.
• Perf Potpourri Miscellaneous thoughts about deployment, Turbolinks, the cost of latency and more.
• Scaling is about Queue Latency Why scaling is almost entirely about the time spent waiting.
• When Should You Stop Scaling? When to stop moving the dyno slider to the right.