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memray vs ray

memray and ray share 4 technologies: matplotlib, Rich, Textual, and jinja2. Both are written in Python.

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What they share and what sets them apart

bloomberg

memray

Memray is a memory profiler for Python

Python15.4kRead on November 8, 2026, at commit 77d7a70What is memray built with?

Only in memray

In common

ray-project

ray

Ray is an AI compute engine. Ray consists of a core distributed runtime and a set of AI Libraries for accelerating ML workloads.

Python44.2kRead on November 6, 2026, at commit 77567c5What is ray built with?

Only in ray

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
memray42,417 lines written50 code files
ray1,531,664 lines written2,777 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
memray0.2% of its commits signed by AIWith Claude Code and GitHub Copilot
ray3.6% of its commits signed by AIWith Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex
ActivityFrom GitHub and its history, on the day SeeRepo read it.
memrayLast push November 4, 20261,439 commits15,417 stars
rayLast push November 6, 202632,373 commits44,213 stars
TestsThe files that test the code, and the share of code files a test imports.
memray53 test files56% of its code files have a test that imports them
ray2,168 test files9.7% of its code files have a test that imports them

Frequently asked questions

Which is bigger, memray or ray?
ray, with 1,531,664 lines written; memray has 42,417.

The proof: ray-project/ray's code at commit 77567c5

Which has more GitHub stars, memray or ray?
ray, with 44,213 stars; memray has 15,417.

The proof: ray-project/ray on GitHub

Which has more tests, memray or ray?
ray, with 2,168 test files; memray has 53.

The proof: ray-project/ray's code at commit 77567c5

Which was updated more recently, memray or ray?
ray: its last push was on November 6, 2026, and memray's on November 4, 2026.

The proof: ray-project/ray's commits on GitHub

Which has more commits signed by AI, memray or ray?
ray: an AI signed 3.6% of its commits, with Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex; in memray, 0.2%.

The proof: the commits each tool signed in ray-project/ray

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