feat: add gperftools mise script

[LesnyRumcajs]

Summary of changes

Make gperftools run not a hassle anymore

❯ mise run gperf:heap forest -- --encrypt-keystore=false --chain calibnet

Changes introduced in this pull request:

• I think I was supposed to add this in the past as part of the mise migration but I forgot 😓

Reference issue to close (if applicable)

Closes

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

Outside contributions

• I have read and agree to the CONTRIBUTING document.
• I have read and agree to the AI Policy document. I understand that failure to comply with the guidelines will lead to rejection of the pull request.

Summary by CodeRabbit

• New Features

  • Added heap profiling capabilities with a new profiling script for performance analysis.

• Chores

  • Updated profiling build configuration and build system dependencies.

[coderabbitai]

Walkthrough

This PR adds profiling infrastructure for gperftools-based memory heap analysis in Forest binaries. It adjusts the profiling profile optimization level, ensures the build script reruns on profiling configuration changes, and introduces a Bash utility script that orchestrates building and executing binaries under heap profiling collection.

Changes

Profiling Infrastructure

Layer / File(s)	Summary
Profiling build configuration Cargo.toml, build.rs	Profiling profile opt-level increases to 1 for better instrumentation balance, and build.rs triggers rebuild when FOREST_PROFILING_GPERFTOOLS_BUILD environment variable changes.
Heap profiling helper script mise-tasks/gperf/heap.sh	New Bash script validates arguments, builds the target binary with gperftools enabled via FOREST_PROFILING_GPERFTOOLS_BUILD=1, extracts the executable path from cargo diagnostics, raises open-file limits, and executes the binary with HEAPPROFILE configured to /tmp/gperfheap.<bin>.prof.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• ChainSafe/forest#5837: Both PRs modify the same gperftools-based memory profiling setup by touching Cargo.toml's [profile.profiling] and adding/adjusting build.rs logic around FOREST_PROFILING_GPERFTOOLS_BUILD, aligning the build/profile tooling flow.

Suggested reviewers

• hanabi1224
• sudo-shashank

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat: add gperftools mise script' directly and specifically describes the main change: adding a new gperftools mise script for profiling. It is clear, concise, and accurately summarizes the primary modification.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch gperftools-script

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch gperftools-script

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@mise-tasks/gperf/heap.sh`:
- Line 36: The script currently calls ulimit -n 8192 in mise-tasks/gperf/heap.sh
which will cause the whole script to exit under set -e if the hard limit is
lower; change this to a best-effort attempt that does not hard-fail (e.g. run
the ulimit call in a conditional or append a fallback so failure only emits a
warning). Update the ulimit invocation (the "ulimit -n 8192" line) to check its
exit status and print a warning via echo or printf if it fails, but continue
execution (do not remove set -e).

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 3949e8e9-47c7-40e2-a3f6-ce9015981a35

📥 Commits

Reviewing files that changed from the base of the PR and between c89d3e3 and 02ab460.

📒 Files selected for processing (3)

• Cargo.toml
• build.rs
• mise-tasks/gperf/heap.sh

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.31%. Comparing base (c89d3e3) to head (02ab460).
✅ All tests successful. No failed tests found.

Additional details and impacted files

see 5 files with indirect coverage changes

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