ci: split benchmarks per type

[maksymar]

This PR splits the existing benchmarks into separate per-type benchmarks.

It also updates the CI workflow to run and collect results for each benchmark crate individually.

[Copilot]

Pull Request Overview

This PR splits the existing unified benchmarks into separate per-crate benchmarks, refactors common code into a shared module, and updates the CI workflow to run and collect results for each benchmark crate individually.

• Remove the root-level canbench.yml and legacy build scripts
• Introduce canbench.yml and result files under each of benchmarks/{btreemap,memory_manager,vec}
• Refactor benchmarks/src/common.rs, add a common module, update imports, and extend CI to handle multiple benchmark jobs

Reviewed Changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
canbench.yml	Deleted root-level benchmark config
benchmarks/src/common.rs	Made Random trait pub, removed now-obsolete mod lines
benchmarks/vec/src/main.rs	Updated use path to benchmarks::common::Random, added stub
benchmarks/vec/canbench.yml	Added per-crate benchmark config
benchmarks/vec/canbench_results.yml	Committed generated benchmark results
benchmarks/memory_manager/**	Added per-crate config, results, and main stub
benchmarks/btreemap/**	Added per-crate config, results, and main stub
benchmarks/Cargo.toml	Defined lib and three [[bin]] entries for each bench binary
.github/workflows/ci.yml	Expanded CI to launch benchmark-btreemap, memory-manager, and vec jobs

Comments suppressed due to low confidence (2)

benchmarks/src/common.rs:1

• These imports (Blob, FixedVec, Storable) are not used in common.rs and can be removed to reduce unnecessary dependencies.

use ic_stable_structures::storable::{Blob, FixedVec, Storable};

benchmarks/src/common.rs:2

• The Rand trait is not used in this file; consider removing it and only importing Rng.

use tiny_rng::{Rand, Rng};

[github-actions]

canbench 🏋 (dir: ./benchmarks/memory_manager) 58cd834 2025-05-23 11:38:51 UTC

✅ ./benchmarks/memory_manager/canbench_results.yml is up to date
📦 canbench_results_memory-manager.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes detected 👍
    counts:   [total 3 | new 0 | improved 0 | regressed 0 | unchanged 3]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  heap_increase:
    status:   No significant changes detected 👍
    counts:   [total 3 | new 0 | improved 0 | regressed 0 | unchanged 3]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  stable_memory_increase:
    status:   No significant changes detected 👍
    counts:   [total 3 | new 0 | improved 0 | regressed 0 | unchanged 3]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

---------------------------------------------------
CSV results saved to canbench_results.csv

[github-actions]

canbench 🏋 (dir: ./benchmarks/btreemap) 58cd834 2025-05-23 11:40:29 UTC

✅ ./benchmarks/btreemap/canbench_results.yml is up to date
📦 canbench_results_btreemap.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes detected 👍
    counts:   [total 285 | new 0 | improved 0 | regressed 0 | unchanged 285]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  heap_increase:
    status:   No significant changes detected 👍
    counts:   [total 285 | new 0 | improved 0 | regressed 0 | unchanged 285]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  stable_memory_increase:
    status:   No significant changes detected 👍
    counts:   [total 285 | new 0 | improved 0 | regressed 0 | unchanged 285]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

---------------------------------------------------
CSV results saved to canbench_results.csv

[github-actions]

canbench 🏋 (dir: ./benchmarks/vec) 58cd834 2025-05-23 11:38:40 UTC

✅ ./benchmarks/vec/canbench_results.yml is up to date
📦 canbench_results_vec.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes detected 👍
    counts:   [total 16 | new 0 | improved 0 | regressed 0 | unchanged 16]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  heap_increase:
    status:   No significant changes detected 👍
    counts:   [total 16 | new 0 | improved 0 | regressed 0 | unchanged 16]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  stable_memory_increase:
    status:   No significant changes detected 👍
    counts:   [total 16 | new 0 | improved 0 | regressed 0 | unchanged 16]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

---------------------------------------------------
CSV results saved to canbench_results.csv