Use get_pooled in process_single_choice

[CatherineSue]

Motivation

The current process_single_choice uses .create() which creates a fresh instance every time, bypassing the pool. It is inefficient.

ParserFactory actually has a registry with pooling.

Modifications

• Use pooled parser with mutex in process_single_choice in grpc router

Accuracy Tests

Benchmarking and Profiling

Checklist

• Format your code according to the Format code with pre-commit.
• Add unit tests according to the Run and add unit tests.
• Update documentation according to Write documentations.
• Provide accuracy and speed benchmark results according to Test the accuracy and Benchmark the speed.

[gemini-code-assist]

Summary of Changes

Hello @CatherineSue, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refactors the process_single_choice function within the gRPC router to enhance performance and resource management. By switching from creating new parser instances to retrieving them from a pre-configured pool, the change aims to reduce overhead and improve the overall efficiency of the parsing process. Additionally, a mutex lock is implemented to ensure safe concurrent access to these pooled resources.

Highlights

• Performance Optimization: The process_single_choice function in the gRPC router now utilizes a pooled parser from the reasoning_parser_factory instead of creating a new instance each time, significantly improving efficiency by reusing existing resources.
• Concurrency Safety: A mutex lock has been introduced when acquiring a pooled parser to ensure thread-safe access and prevent potential data races in concurrent environments.

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[gemini-code-assist]

Code Review

This pull request correctly switches from creating a new reasoning parser on each request to using a pooled parser, which should improve efficiency by reducing allocations. The use of a mutex to protect the shared parser is appropriate. I have one suggestion to minimize the duration for which the lock is held, which is a good practice in concurrent programming.

[gemini-code-assist]

To minimize the duration the mutex is held, it's a good practice to release the lock as soon as the shared resource is no longer needed. You can achieve this by scoping the lock acquisition and the call to detect_and_parse_reasoning within a block, and then processing the result outside of that block. This ensures the lock is not held during the match and subsequent assignments.

            let result = {
                let mut parser = pooled_parser
                    .lock()
                    .map_err(|e| format!("Failed to acquire reasoning parser lock: {}", e))?;
                parser.detect_and_parse_reasoning(&processed_text)
            };

            match result {
                Ok(result) => {
                    if !result.reasoning_text.is_empty() {
                        reasoning_text = Some(result.reasoning_text);
                    }
                    processed_text = result.normal_text;
                }
                Err(e) => {
                    return Err(format!("Reasoning parsing error: {}", e));
                }
            }