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feat: better Tokenization # workers heuristic #766

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feat: better Tokenization # workers heuristic #766

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1c99226
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michaelfeil Nov 25, 2025
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michaelfeil Nov 26, 2025
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6 changes: 4 additions & 2 deletions router/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -215,8 +215,10 @@ pub async fn run(

tracing::info!("Maximum number of tokens per request: {max_input_length}");

let tokenization_workers = tokenization_workers.unwrap_or_else(num_cpus::get);

// fall-back to num_cpus - 1 to leave some CPU for the backend, and at most 64 workers.
let tokenization_workers =
tokenization_workers.unwrap_or_else(|| std::cmp::min(std::cmp::max(1, num_cpus::get() - 1), 64));

// Try to load new ST Config
let mut new_st_config: Option<NewSTConfig> = None;
let config_path = model_root.join("config_sentence_transformers.json");
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