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fern-support merged 1 commit into from
May 20, 2026
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Update changelogs from fern repo #5579

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7 changes: 7 additions & 0 deletions fern/products/sdks/generators/python/changelog/2026-05-20.mdx
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## 5.14.1
**`(fix):`** Fix SSE streaming performance regression by caching `pydantic.TypeAdapter` instances
in `parse_obj_as()`. Previously, a new TypeAdapter was constructed on every call, which
is extremely expensive for discriminated union types. This caused ~8x slowdown in SSE
event parsing introduced in v4.51.0 (`parse_sse_obj`).


## 5.14.0
**`(feat):`** Add support for the `x-fern-base-path` OpenAPI extension. Root path
parameters declared on the base path are hoisted to the client
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