18 Mar, 2026
3 commits
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Implemented CTranslate2 for the three local translation models and switched the existing local_nllb / local_marian factories over to it. The new runtime lives in local_ctranslate2.py, including HF->CT2 auto-conversion, float16 compute type mapping, Marian direction handling, and NLLB target-prefix decoding. The service wiring is in service.py (line 113), and the three model configs now point at explicit ctranslate2-float16 dirs in config.yaml (line 133). I also updated the setup path so this is usable end-to-end: ctranslate2>=4.7.0 was added to requirements_translator_service.txt and requirements.txt, the download script now supports pre-conversion in download_translation_models.py (line 27), and the docs/config examples were refreshed in translation/README.md. I installed ctranslate2 into .venv-translator, pre-converted all three models, and the CT2 artifacts are now already on disk: models/translation/facebook/nllb-200-distilled-600M/ctranslate2-float16 models/translation/Helsinki-NLP/opus-mt-zh-en/ctranslate2-float16 models/translation/Helsinki-NLP/opus-mt-en-zh/ctranslate2-float16 Verification was solid. python3 -m compileall passed, direct TranslationService smoke tests ran successfully in .venv-translator, and the focused NLLB benchmark on the local GPU showed a clear win: batch_size=16: HF 0.347s/batch, 46.1 items/s vs CT2 0.130s/batch, 123.0 items/s batch_size=1: HF 0.396s/request vs CT2 0.126s/request One caveat: translation quality on some very short phrases, especially opus-mt-en-zh, still looks a bit rough in smoke tests, so I’d run your real quality set before fully cutting over. If you want, I can take the next step and update the benchmark script/report so you have a fresh full CT2 performance report for all three models.
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batch×并发矩阵”彻底分开展示。 改动在这几处： scripts/benchmark_translation_local_models.py：新增 --suite extended，支持 batch_size=1,4,8,16,32,64、concurrency=1,2,4,8,16,64、以及 batch_size * concurrency <= 128 的组合矩阵；并且单场景模式现在只加载目标模型，load_seconds 更干净，也支持 --disable-cache。 translation/README.md：把性能章节拆成了 batch_sweep、concurrency_sweep、batch x concurrency matrix 三块，补了这次复测的参数、复现命令和摘要表。 perf_reports/20260318/translation_local_models/README.md：新增本轮补测摘要。 完整结果在 translation_local_models_extended_221846.md 和 translation_local_models_extended_221846.json。 这次补测的核心结论很明确： 在线单条请求应该看 concurrency_sweep，也就是固定 batch_size=1 的表。 离线批量吞吐应该看 batch_sweep，4 个方向的最高 raw throughput 都出现在 batch_size=64，但更均衡的默认值仍更像 batch_size=16。 当前本地 seq2seq backend 有单模型锁，提升客户端并发几乎不涨吞吐，主要是把排队时间变成更高的 p95；所以并发更像“延迟预算”问题，不是“扩容吞吐”手段。 本轮在线单条里最快的是 opus-mt-zh-en；最慢、且并发放大最明显的是 nllb-200-distilled-600m en->zh。
17 Mar, 2026
5 commits
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多个独立翻译能力”重构。现在业务侧不再把翻译当 provider 选型，QueryParser 和 indexer 统一通过 6006 的 translator service client 调用；真正的能力选择、启用开关、model + scene 路由，都收口到服务端和新的 translation/ 目录里了。 这次的核心改动在 config/services_config.py、providers/translation.py、api/translator_app.py、config/config.yaml 和新的 translation/service.py。配置从旧的 services.translation.provider/providers 改成了 service_url + default_model + default_scene + capabilities，每个能力可独立 enabled；服务端新增了统一的 backend 管理与懒加载，真实实现集中到 translation/backends/qwen_mt.py、translation/backends/llm.py、translation/backends/deepl.py，旧的 query/qwen_mt_translate.py、query/llm_translate.py、query/deepl_provider.py 只保留兼容导出。接口上，/translate 现在标准支持 scene，context 作为兼容别名继续可用，健康检查会返回默认模型、默认场景和已启用能力。