Free Performance Auditor for Spine Exports (Web-Based)

amol lokare

I'm an animator and technical artist, and I’ve noticed a lot of projects struggle with performance on low-end mobile devices usually due to things we overlook in the editor, like heavy clipping masks or constantly keying the Draw Order.

To help my own studio (Upswing Game) catch these issues early, I built a browser-based tool called SpineOptima. I decided to release it for free to the community.

What it checks:

🚩 Hidden Clipping Masks: Identifies masks that are computationally expensive.

🚩 Batch-Breaking Keys: warns if Draw Order is keyed too frequently.

🚩 Vertex/Bone Counts: Quick overview of asset weight.

Try it here: [https://upswing-spine-optima.netlify.app/] (It runs locally in the browser, so your JSON data is never uploaded).

I’d love to hear your feedback! If there are other "Red Flags" you think I should add to the audit list, let me know and I'll try to code them in.

Cheers, Amol

Nate

Thanks for sharing! Pretty much the performance metrics documentation would give you things to flag, like the number of vertex transforms and the number of clipped vertices (CPU usage) and deform keys (bloats memory usage). You can compare what you calculate to the metrics view.

https://esotericsoftware.com/spine-metrics#Performance

amol lokare

Thanks, Nate! That documentation link is super helpful.

You hit the nail on the head regarding vertex transforms and deform keys, I didn't realize how much deform keys specifically bloated memory usage compared to CPU load. I'll definitely prioritize adding checks for those 'Hidden Memory Killers' in the next update.

My main goal is to give producers (who might not have the Spine Editor installed) a way to flag these issues during QA, so aligning my calculations with the official Metrics view is the perfect next step.

Appreciate the insight!

Davide

amol lokare

You might want to compare the results of your tool with this one: https://v2.spine.schmooky.dev/
I know some people who use it for the same purpose you built yours.

amol lokare

Thanks for the link, Davide! I wasn't aware of the Schmooky tool, it looks like a great resource.
I'll definitely run some benchmarks to compare our results. My goal with SpineOptima was to make the 'Red Flags' as obvious as possible for non-technical users, but it’s always good to see how others are solving the same problem.