fix: change SaveAnimatedWEBP default method to 'fastest' for better performance

[octo-patch]

Fixes #13300

Problem

The SaveAnimatedWEBP node defaults to method='default' which maps to WebP compression method=4. This causes very slow encoding times for animated WebP files with many frames — users reported 2.5+ minutes for 120-frame videos.

Community testing confirmed that switching to method='fastest' (method=0) reduces encoding time from ~31s to ~10s for typical use cases.

Solution

Change the default value for the method combo input from 'default' (method=4) to 'fastest' (method=0).

All options (default, fastest, slowest) remain available for users who need higher compression ratios. This only changes what is selected when a user first adds the node to their workflow.

Testing

• Confirmed COMPRESS_METHODS = {"default": 4, "fastest": 0, "slowest": 6} mapping is unchanged
• The default="fastest" parameter is correctly handled by IO.Combo.Input
• Existing workflows with an explicit method selection are unaffected (saved workflow JSON preserves the chosen value)

[coderabbitai]

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ℹ️ Recent review info

⚙️ Run configuration

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📥 Commits

Reviewing files that changed from the base of the PR and between 2d861fb and f4d4dfa.

📒 Files selected for processing (1)

• comfy_extras/nodes_images.py

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📝 Walkthrough

Walkthrough

The pull request updates the SaveAnimatedWEBP class in comfy_extras/nodes_images.py. In the define_schema method, the method input field is modified to include a default value of "fastest" for the IO.Combo.Input parameter. The choices remain restricted to the available compression methods. No other schema or execution logic modifications are introduced.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: setting SaveAnimatedWEBP default method to 'fastest' for better performance, which matches the code change.
Description check	✅ Passed	The description is directly related to the changeset, explaining the problem, solution, and testing for the default method change in SaveAnimatedWEBP.
Linked Issues check	✅ Passed	The PR fully addresses the requirements from issue #13300 by changing the default compression method from 'default' (method=4) to 'fastest' (method=0), reducing encoding time from minutes to seconds.
Out of Scope Changes check	✅ Passed	All changes are in-scope: only the default value for the 'method' parameter in SaveAnimatedWEBP's schema is modified; no unrelated code alterations are present.

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