August 2021

Summary of the Japanese blog article: Cases of MacBook Pro (Intel) suddenly slowing down. This often occurs when recovering from standby. Keyboard input becomes extremely sluggish, making it impractical to use. Previously, the cause of this issue was unknown, but it has now been determined that the CPU frequency of the Mac is clocking down.

Here is an overview in English of a blog post discussing a web application: The code for a web application that takes a URL included as a parameter in a request URL, makes a request to that URL using headless Chrome, captures a screenshot, and returns it in the response. The service is implemented in Python using Bottle and gevent.

When attempting to run the command `% flutter downgrade v1.22.6`, you may encounter the error message "There is no previously recorded version for channel 'stable'." This prevents the downgrade. To successfully downgrade, you should use `git checkout` in the Flutter SDK directory.

I upgraded Ubuntu from version 18 to 20, and after the upgrade, I noticed that when retrieving data from MySQL 5.7 RDS using Django, all Japanese characters were displayed as ????????. Running `mysql> show variables like "%chara%";` revealed that character_set_client and other character sets were set to latin1. Ideally, these character sets should be set to utf8mb4.