Prisma 5.21.0 — Release Notes & Engineering Impact

Today, we are excited to share the `5.21.0` release 🎉 🌟 **Help us spread the word about Prisma by starring the repo ☝️ or [posting on X](https://twitter.com/intent/tweet?text=Check%20out%20the%20latest%20@prisma%20release%20v5.21.0%20%F0%9F%9A%80%0D%0A%0D%0Ahttps://github.com/prisma/prisma/releases/tag/5.21.0) about the release.** ## Highlights ### Better support for tracing in MongoDB The `tracing` Preview feature now has full support for MongoDB with previously missing functionality now implemented. This is a part of the ongoing effort to stabilize this Preview feature and release it in General Availability. `tracing` is a Preview feature that enables built-in support for OpenTelemetry instrumentation inside the Prisma Client and provides deep insights into the performance and timing of your queries. See our [documentation for more information](https://www.prisma.io/docs/orm/prisma-client/observability-and-logging/opentelemetry-tracing). For an easy to use and zero-configuration tracing instrumentation tool with a dashboard that provides an overview of your queries, statistics, and AI-powered recommendations, try [Prisma Optimize](https://pris.ly/gh/optimize). ### WebAssembly engine size decrease for edge functions Due to recent changes, some users experienced a steep increase of the bundle size in Prisma 5.20 when using [the `driverAdapters` Preview feature](https://www.prisma.io/docs/orm/overview/databases/database-drivers#driver-adapters), going over the 1 MB limit on the free tier of Cloudflare Workers. This has now been fixed. ## Fixes and improvements ### Prisma Engines - [Avoid regex crate for wasm bundle size (to keep cloudflare free plan)](https://github.com/prisma/prisma-engines/issues/5008) ## Credits Huge thanks to @austin-tildei, @LucianBuzzo, @mcuelenaere, @pagewang0, @key-moon, @pranayat, @yubrot, @skyzh for helping!