Non-Blocking Async refinement calls for better queing CF-666

[aseembits93]

User description

I'm interleaving refinement generation with the candidate evaluation for better cpu utilization and non blocking calls. awaiting in the end when there is nothing else to do. This should save some time in the candidate evaluation loop.

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PR Type

Enhancement

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Description

• Asynchronously submit refinement tasks in loop

• Change refine_optimizations to return Future

• Increase executor pool size to 3 workers

• Remove blocking synchronous refinement logic

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Diagram Walkthrough

flowchart LR
  A["determine_best_candidate start"]
  B["ThreadPoolExecutor with 3 workers"]
  C["Submit line profiler tasks"]
  D["Submit refine_optimizations futures"]
  E["Wait for refinement futures"]
  F["Extend candidates with refinements"]
  A --> B
  B --> C
  C --> D
  D --> E
  E --> F

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File Walkthrough

	Relevant files
Enhancement	function_optimizer.py Enable async refinement task handling                                        codeflash/optimization/function_optimizer.py Increased ThreadPoolExecutor workers from 2 to 3 Collected refinement tasks as futures asynchronously Removed blocking refinement logic at loop end Updated refine_optimizations to return Future +25/-24

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[github-actions]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 3 🔵🔵🔵⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Undefined Variable line_profiler_done is used in a condition but never defined, which will raise a NameError at runtime. if (not len(candidates)) and line_profiler_done: Executor Lifecycle Verify that the ThreadPoolExecutor created in the with block remains active until all submitted futures (including those from refine_optimizations) complete before shutting down. with concurrent.futures.ThreadPoolExecutor(max_workers=3) as executor: ai_service_client = self.aiservice_client if exp_type == "EXP0" else self.local_aiservice_client Inconsistent Logging A raw print is used to log "Added candidates from refinement"; consider using the existing logger for consistent logging output. print("Added candidates from refinement")

[github-actions]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Possible issue	Replace undefined completion flag The variable line_profiler_done is not defined and will raise a NameError. Instead, detect completion by checking that no profiling future remains (e.g., future_line_profile_results is None). Replace the undefined flag with a concrete condition. codeflash/optimization/function_optimizer.py [560] -if (not len(candidates)) and line_profiler_done: +if not candidates and future_line_profile_results is None: Suggestion importance[1-10]: 9 __ Why: The variable line_profiler_done is undefined, causing a NameError and blocking the refinement logic; replacing it addresses a critical bug.	High
	Flatten nested refinement results refinement_response is a list of lists returned from multiple futures, so extending will insert lists rather than individual candidates. Flatten the nested lists to properly add each candidate. codeflash/optimization/function_optimizer.py [566] -candidates.extend(refinement_response) +for batch in refinement_response: + candidates.extend(batch) Suggestion importance[1-10]: 7 __ Why: Using extend on a list of lists will insert lists instead of individual candidates, so flattening ensures each candidate is correctly added.	Medium
General	Use logger instead of print Replace the use of print with the module’s logger to maintain consistent logging and allow configurable log levels. codeflash/optimization/function_optimizer.py [567] -print("Added candidates from refinement") +logger.info("Added candidates from refinement") Suggestion importance[1-10]: 4 __ Why: Replacing print with logger.info improves consistency with existing logging and configurable log levels.	Low

[misrasaurabh1]

i will let @KRRT7 review

[aseembits93]

@KRRT7 ready to review, large diffs are due to changes in indentation

[aseembits93]

closing as changes present in #615