Mobile Development
Where React Native Cold Start Time Actually Goes
Cold start is rarely one slow thing. It is a dozen small ones, and profiling it properly changes which of them you bother to fix.
Tag
Performance
Every BytesByBytes article tagged Performance - 3 in total.
Developer Tools
CI Caching That Actually Works
Most CI caches are slower than no cache at all. The difference comes down to what you key on, what you store and how honestly you measure the result.
Data Engineering
How Parquet File Layout Decides Your Query Speed
Two datasets with identical rows and identical schemas can differ by an order of magnitude in scan time. The difference is layout - row groups, sort order and file size.