refactor: Rename optimize() -> try_optimize_tx_size()

[snawaz]

The current name optimize() is too generic and doesn’t convey what exactly to optimize for: space or performance?.

Initially, I assumed it was meant for performance optimization, but after reading through the relevant code, especially optimize_strategy(), I realized the optimization is actually about reducing transaction size.

Changes:

• Renamed optimize() → try_optimize_tx_size()
• Renamed optimize_strategy() → try_optimize_tx_size_if_needed()

I think this makes the purpose explicit and avoids ambiguity. The function focuses on minimizing transaction size (not any size in general), not improving speed or compute efficiency.

Summary by CodeRabbit

• Refactor
  • Internal optimization APIs were renamed to better reflect transaction-size optimization and now return richer success/error semantics; related call sites and documentation updated.
• Tests
  • Unit tests updated to use the renamed optimization entry points and to handle the revised return semantics.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

📝 Walkthrough

Walkthrough

The PR renames the trait method optimize to try_optimize_tx_size on BaseTask and updates all implementations (e.g., ArgsTask, BufferTask) and documentation accordingly. TaskStrategist replaces its private optimize_strategy(...) -> usize with try_optimize_tx_size_if_needed(...) -> Result<usize, SignerError>, updates build_strategy to call and handle the Result, and changes internal calls from optimize() to try_optimize_tx_size(). Tests and call sites referencing the old names were updated to the new names.

Possibly related PRs

• Handling of intent execution failures #564 — Renames BaseTask::optimize to try_optimize_tx_size and updates corresponding implementations and call sites touching the same trait and files.

Suggested reviewers

• GabrielePicco
• bmuddha

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch snawaz/rename-optimize

---

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📥 Commits

Reviewing files that changed from the base of the PR and between 2980bf2 and db32d00.

📒 Files selected for processing (4)

• magicblock-committor-service/src/tasks/args_task.rs (1 hunks)
• magicblock-committor-service/src/tasks/buffer_task.rs (1 hunks)
• magicblock-committor-service/src/tasks/mod.rs (1 hunks)
• magicblock-committor-service/src/tasks/task_strategist.rs (4 hunks)

🧰 Additional context used

🧠 Learnings (1)

📚 Learning: 2025-11-07T13:20:13.793Z

Learnt from: bmuddha
Repo: magicblock-labs/magicblock-validator PR: 589
File: magicblock-processor/src/scheduler/coordinator.rs:227-238
Timestamp: 2025-11-07T13:20:13.793Z
Learning: In magicblock-processor's ExecutionCoordinator (scheduler/coordinator.rs), the `account_contention` HashMap intentionally does not call `shrink_to_fit()`. Maintaining slack capacity is beneficial for performance by avoiding frequent reallocations during high transaction throughput. As long as empty entries are removed from the map (which `clear_account_contention` does), the capacity overhead is acceptable.

Applied to files:

• magicblock-committor-service/src/tasks/task_strategist.rs

🧬 Code graph analysis (3)

magicblock-committor-service/src/tasks/mod.rs (2)

magicblock-committor-service/src/tasks/args_task.rs (1)

• try_optimize_tx_size (87-100)

magicblock-committor-service/src/tasks/buffer_task.rs (1)

• try_optimize_tx_size (72-78)

magicblock-committor-service/src/tasks/args_task.rs (2)

magicblock-committor-service/src/tasks/buffer_task.rs (1)

• try_optimize_tx_size (72-78)

magicblock-committor-service/src/tasks/mod.rs (1)

• try_optimize_tx_size (79-81)

magicblock-committor-service/src/tasks/buffer_task.rs (2)

magicblock-committor-service/src/tasks/args_task.rs (1)

• try_optimize_tx_size (87-100)

magicblock-committor-service/src/tasks/mod.rs (1)

• try_optimize_tx_size (79-81)

🔇 Additional comments (5)

magicblock-committor-service/src/tasks/args_task.rs (1)

87-100: LGTM! The rename clarifies optimization intent.

The method rename from optimize to try_optimize_tx_size makes the API more self-documenting. The logic correctly handles optimization by converting Commit tasks to BufferTask (which uses a buffer strategy to reduce transaction size), while other task types return Err(self) to indicate they cannot be optimized.

magicblock-committor-service/src/tasks/buffer_task.rs (1)

71-78: LGTM! Rename is consistent and well-documented.

The method rename from optimize to try_optimize_tx_size aligns with the trait change. The comment clearly explains why BufferTask returns Err(self): the buffer doesn't contribute to transaction size, so no further optimization is possible.

magicblock-committor-service/src/tasks/task_strategist.rs (3)

56-57: LGTM! Caller correctly handles the renamed function.

The call to try_optimize_tx_size_if_needed correctly:

• Propagates SignerError with ?
• Compares the returned size against MAX_ENCODED_TRANSACTION_SIZE
• Falls back to lookup tables if size still exceeds the limit

---

154-241: LGTM! Function rename and logic are sound.

The rename from optimize_strategy to try_optimize_tx_size_if_needed makes the function's purpose explicit. Key points:

• Returns Result<usize, SignerError> to propagate signing errors
• Returns the transaction size after optimization attempts (which may still exceed the limit)
• Correctly calls task.try_optimize_tx_size() (line 213) to attempt per-task optimization
• Uses a max-heap to prioritize optimizing the largest instructions first
• Handles both successful optimization (Ok(optimized_task)) and non-optimizable tasks (Err(old_task))

The caller is responsible for checking if the returned size is within MAX_ENCODED_TRANSACTION_SIZE, which is the correct design.

---

475-475: LGTM! Test updated to use the new function name.

The test correctly calls try_optimize_tx_size_if_needed and ignores the Result. Since this test is focused on verifying optimization prioritization (largest tasks optimized first) rather than error handling, ignoring the Result is acceptable here.

---

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[snawaz]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• refactor: Simplify Task types #665
• feat: Make TaskStrategy more granular #618
• refactor: Rename optimize() -> try_optimize_tx_size() #617 👈 (View in Graphite)
• feat: Execute CommitDiff as BufferTask #616
• feat: Add support for CommitDiff to efficiently commit small changes in large delegated accounts #575
• master

This stack of pull requests is managed by Graphite. Learn more about stacking.

[taco-paco]

I don't mind the change to highlight what we exactly optimizing, but few points:

1. This should be opened into master, as it does not necessarily refer to commit-diff-buffer branch. Also this way commit-diff-buffer branch will be less noisy in diff with master
2. I'd prefer name optimize_tx_size, since in theory we iteratively optimizing it and not doing it right away, at least in context of TaskStrategist

[snawaz]

2. I'd prefer name optimize_tx_size, since in theory we iteratively optimizing it and not doing it right away, at least in context of TaskStrategist

Yes, that's a great name as well. We can keep that instead.

Or maybe try_optimize_tx_size() as it returns Result?

1. This should be opened into master, as it does not necessarily refer to commit-diff-buffer branch. Also this way commit-diff-buffer branch will be less noisy in diff with master

Yes. It should have been onto master if done independently. Actually, I wanted to reorder, and put this earlier in the stack so that later PRs can use the change.

And no, it wont be noisy. This PR wont merge to commit-diff-buffer. I use Graphite to manage my stack of PRs. So this PR will be merge to master directly.

[taco-paco]

I think suggestion to rename to try_optimize_* makes the most sense.

[coderabbitai]

Actionable comments posted: 2

Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (1)

magicblock-committor-service/src/tasks/task_strategist.rs (1)

465-479: Make the test fail if try_optimize_tx_size_if_needed returns an error

In test_optimize_strategy_prioritizes_largest_tasks, the call is currently ignored via let _ = ..., so a signing/assembly error would still yield a “passing” test. Prefer asserting success:

-        let _ = TaskStrategist::try_optimize_tx_size_if_needed(&mut tasks);
+        TaskStrategist::try_optimize_tx_size_if_needed(&mut tasks)
+            .expect("tx-size optimization should succeed in this test");

This keeps the behavioral assertions while ensuring unexpected errors surface as test failures.

📜 Review details

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between d445507 and 0907290.

📒 Files selected for processing (4)

• magicblock-committor-service/src/tasks/args_task.rs (1 hunks)
• magicblock-committor-service/src/tasks/buffer_task.rs (1 hunks)
• magicblock-committor-service/src/tasks/mod.rs (1 hunks)
• magicblock-committor-service/src/tasks/task_strategist.rs (4 hunks)

🧰 Additional context used

🧬 Code graph analysis (3)

magicblock-committor-service/src/tasks/buffer_task.rs (2)

magicblock-committor-service/src/tasks/args_task.rs (1)

• try_optimize_tx_size (87-100)

magicblock-committor-service/src/tasks/mod.rs (1)

• try_optimize_tx_size (79-81)

magicblock-committor-service/src/tasks/args_task.rs (2)

magicblock-committor-service/src/tasks/buffer_task.rs (1)

• try_optimize_tx_size (72-78)

magicblock-committor-service/src/tasks/mod.rs (1)

• try_optimize_tx_size (79-81)

magicblock-committor-service/src/tasks/mod.rs (2)

magicblock-committor-service/src/tasks/args_task.rs (1)

• try_optimize_tx_size (87-100)

magicblock-committor-service/src/tasks/buffer_task.rs (1)

• try_optimize_tx_size (72-78)

🔇 Additional comments (2)

magicblock-committor-service/src/tasks/args_task.rs (1)

87-99: ArgsTask::try_optimize_tx_size correctly preserves prior behavior

The Commit branch now clearly opts into BufferTask while other variants correctly return Err(self) when no tx‑size optimization is possible, matching the updated BaseTask contract. No functional issues spotted.

magicblock-committor-service/src/tasks/buffer_task.rs (1)

72-78: No-op BufferTask::try_optimize_tx_size is consistent with design

Returning Err(self) here is appropriate since buffer-based commits already move account data off the transaction and there’s no further tx‑size reduction to attempt.

[coderabbitai]

Actionable comments posted: 1

♻️ Duplicate comments (1)

magicblock-committor-service/src/tasks/mod.rs (1)

77-81: Fix typo in BaseTask::try_optimize_tx_size documentation

The docstring still uses “buddled” instead of “bundled”.

-    /// Optimize for transaction size so that more instructions can be buddled together in a single
+    /// Optimize for transaction size so that more instructions can be bundled together in a single

📜 Review details

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 0907290 and 1dd9fbd.

📒 Files selected for processing (4)

• magicblock-committor-service/src/tasks/args_task.rs (1 hunks)
• magicblock-committor-service/src/tasks/buffer_task.rs (1 hunks)
• magicblock-committor-service/src/tasks/mod.rs (1 hunks)
• magicblock-committor-service/src/tasks/task_strategist.rs (4 hunks)

🧰 Additional context used

🧠 Learnings (1)

📚 Learning: 2025-11-07T13:20:13.793Z

Learnt from: bmuddha
Repo: magicblock-labs/magicblock-validator PR: 589
File: magicblock-processor/src/scheduler/coordinator.rs:227-238
Timestamp: 2025-11-07T13:20:13.793Z
Learning: In magicblock-processor's ExecutionCoordinator (scheduler/coordinator.rs), the `account_contention` HashMap intentionally does not call `shrink_to_fit()`. Maintaining slack capacity is beneficial for performance by avoiding frequent reallocations during high transaction throughput. As long as empty entries are removed from the map (which `clear_account_contention` does), the capacity overhead is acceptable.

Applied to files:

• magicblock-committor-service/src/tasks/task_strategist.rs

🧬 Code graph analysis (3)

magicblock-committor-service/src/tasks/mod.rs (2)

magicblock-committor-service/src/tasks/args_task.rs (1)

• try_optimize_tx_size (87-100)

magicblock-committor-service/src/tasks/buffer_task.rs (1)

• try_optimize_tx_size (72-78)

magicblock-committor-service/src/tasks/args_task.rs (2)

magicblock-committor-service/src/tasks/buffer_task.rs (1)

• try_optimize_tx_size (72-78)

magicblock-committor-service/src/tasks/mod.rs (1)

• try_optimize_tx_size (79-81)

magicblock-committor-service/src/tasks/buffer_task.rs (2)

magicblock-committor-service/src/tasks/args_task.rs (1)

• try_optimize_tx_size (87-100)

magicblock-committor-service/src/tasks/mod.rs (1)

• try_optimize_tx_size (79-81)

🔇 Additional comments (3)

magicblock-committor-service/src/tasks/args_task.rs (1)

87-99: ArgsTask::try_optimize_tx_size correctly implements the new trait contract

Commit tasks are upgraded to BufferTask while non‑commit variants correctly return Err(self), matching the BaseTask::try_optimize_tx_size semantics and the strategist’s expectations. No further changes needed here.

magicblock-committor-service/src/tasks/buffer_task.rs (1)

72-78: BufferTask::try_optimize_tx_size correctly indicates no further size optimization

Returning Err(self) for buffer‑based tasks is consistent with the trait’s contract and the design comment that buffers don’t further reduce tx size. This wiring looks good.

magicblock-committor-service/src/tasks/task_strategist.rs (1)

56-58: try_optimize_tx_size_if_needed integration and semantics look consistent

build_strategy now cleanly delegates to try_optimize_tx_size_if_needed, using the returned tx length for the size check and propagating real SignerErrors via ?, while the helper preserves the “optimize heaviest tasks first” behavior and respects Ok(optimized_task) vs Err(self) from BaseTask::try_optimize_tx_size. This matches the new naming and doc semantics without introducing functional regressions.

Also applies to: 154-241