# Deno v1.25.1 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.25.1
- **Released:** Sep 02, 2022
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.25.1/

## Executive Summary (TL;DR)
Deno v1.25.1. Source highlight: feat(ops): support `v8::FastApiCallbackOptions` (#15721)

## New Features
- feat(ops): support `v8::FastApiCallbackOptions` (#15721)
- feat(serde_v8): Serialize integers as BigInt (#15692)

## Improvements
- perf(ext/web): flatten op arguments for text_encoding (#15723)
- perf(ops): inline String args (#15681)
- perf(runtime): optimize allocations in read/write checks (#15631)
- perf: use fast api for `core.isProxy` (#15682)
- perf: use fast api for op_now (#15643)

## Bug Fixes
- fix(check): --remote and --no-remote should be mutually exclusive (#14964)
- fix(cli): `deno upgrade --canary` always downloaded latest version even if it
- fix(compile): panic when running with a populated dep analysis cache (#15672)
- fix(docs): add missing categories (#15684)
- fix(ext/ffi): Fix pointer types (#15730)
- fix(ext/flash): add missing backticks in server docs (#15644)