+micromamba (#2681)

projects/github.com/mamba-org/micro/package.yml

@@ -0,0 +1,48 @@
+versions:
+  github: mamba-org/micromamba-releases
+  strip: /-\d+$/
+  #FIXME ^^ versions are eg. 1.2.3-1 where the releases are usually -0
+  #      ^^ and revisions are increments of 1 so this is actually a 4th version
+  #      ^^ number for us that we need to extract
+
+provides:
+  - bin/micromamba
+
+warnings:
+  - vendored
+
+platforms:
+  - darwin
+  # broken on linux pending https://github.com/mamba-org/mamba/issues/2650
+
+dependencies:
+  curl.se/ca-certs: '*'
+
+runtime:
+  env:
+    REQUESTS_CA_BUNDLE: ${{deps.curl.se/ca-certs.prefix}}/ssl/cert.pem
+
+build:
+  dependencies:
+    curl.se: '*'
+    sourceware.org/bzip2: '*'
+  working-directory: "{{prefix}}"
+  script: |
+    curl -L \
+      "https://github.com/mamba-org/micromamba-releases/releases/download/{{version.tag}}/micromamba-$PID.tar.bz2" \
+      | tar xj
+    rm -rf info
+  env:
+    linux/x86-64: {PID: linux-64}
+    linux/aarch64: {PID: linux-aarch64}
+    darwin/x86-64: {PID: osx-64}
+    darwin/aarch64: {PID: osx-arm64}
+
+test:
+  - micromamba | grep {{version}}
+
+  - |
+    eval "$(micromamba shell hook --shell bash)"
+    micromamba create numpy --channel anaconda --prefix mm-prefix --yes
+    micromamba activate mm-prefix
+    ./test.py

projects/github.com/mamba-org/micro/test.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+# https://www.pugetsystems.com/labs/hpc/standalone-python-conda-envs-without-installing-conda-using-micromamba-2287/
+
+"""
+Matrix multiplication of 2 n x n matrices
+"""
+
+import numpy as np
+import time
+
+n = 8000
+A = np.array(np.random.rand(n, n))
+B = np.array(np.random.rand(n, n))
+C = np.empty_like(A)
+
+start_time = time.time()
+C = np.matmul(A, B)
+run_time = time.time() - start_time
+
+print( f'{(2e-9 * (n ** 3 + n ** 2)) / run_time :.2f} GFLOPS' )