Prepare coincurve 22.0.0 for Python 3.14 and free threading

.github/scripts/install-macos-build-deps.sh

@@ -1,14 +1,6 @@
 #!/bin/bash
-set -ex
+set -euxo pipefail
 
-# update brew
-brew update
-
-# Update openssl if necessary
-brew outdated openssl || brew upgrade openssl
-
-# Install packages needed to build lib-secp256k1
-for pkg in pkg-config; do
-    brew list $pkg > /dev/null || brew install $pkg
-    brew outdated --quiet $pkg || brew upgrade $pkg
-done
+# CMake uses pkg-config to detect system libraries. Avoid updating the entire
+# Homebrew installation in every CI job; the hosted runner image is immutable.
+brew list pkg-config > /dev/null 2>&1 || brew install pkg-config

.github/workflows/benchmark.yml

@@ -0,0 +1,27 @@
+name: benchmark
+
+on:
+  workflow_dispatch:
+
+jobs:
+  benchmark:
+    name: Run benchmarks
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v7
+
+    - uses: actions/setup-python@v6
+      with:
+        python-version: '3.14'
+
+    - name: Install GMP headers
+      run: |
+        sudo apt-get update
+        sudo apt-get install --yes libgmp-dev
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v8
+
+    - name: Run benchmarks
+      run: uv run --python-preference system scripts/bench.py