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release(core): 1.2.15#35367

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ccurme (ccurme) merged 1 commit intomasterfrom
cc/release_core
Feb 20, 2026
Merged

release(core): 1.2.15#35367
ccurme (ccurme) merged 1 commit intomasterfrom
cc/release_core

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@github-actions github-actions bot added core `langchain-core` package issues & PRs dependencies Pull requests that update a dependency file (e.g. `pyproject.toml` or `uv.lock`) internal release PRs made to release a package labels Feb 20, 2026
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codspeed-hq bot commented Feb 20, 2026

Merging this PR will degrade performance by 21.18%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 7 improved benchmarks
❌ 1 regressed benchmark
✅ 5 untouched benchmarks
⏩ 23 skipped benchmarks1

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
WallTime test_import_time[PydanticOutputParser] 623.9 ms 566 ms +10.23%
WallTime test_import_time[Runnable] 583.7 ms 524.8 ms +11.23%
WallTime test_async_callbacks_in_sync 19.5 ms 24.8 ms -21.18%
WallTime test_import_time[RunnableLambda] 587.7 ms 519.8 ms +13.06%
WallTime test_import_time[BaseChatModel] 669.7 ms 570.7 ms +17.35%
WallTime test_import_time[Document] 213.4 ms 192.3 ms +10.97%
WallTime test_import_time[ChatPromptTemplate] 749 ms 672.2 ms +11.42%
WallTime test_import_time[InMemoryRateLimiter] 196.8 ms 176.4 ms +11.58%

Comparing cc/release_core (ff9dc77) with master (63f3669)2

Open in CodSpeed

Footnotes

  1. 23 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

  2. No successful run was found on master (070c234) during the generation of this report, so 63f3669 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report.

@ccurme ccurme (ccurme) merged commit bcfb87c into master Feb 20, 2026
93 of 94 checks passed
@ccurme ccurme (ccurme) deleted the cc/release_core branch February 20, 2026 18:44
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