feat/improve local walltime

[adriencaccia]

• feat: improve time unit display in local walltime
• feat: do not store the profile when CODPSEED_PROFILE_FOLDER is not set

[Copilot]

Pull Request Overview

This PR improves the local walltime display by implementing human-readable time unit formatting and prevents profile storage when the CODSPEED_PROFILE_FOLDER environment variable is not set.

Key Changes:

• Added format_time() function to convert nanosecond timestamps into human-readable strings with appropriate units (ns, µs, ms, s)
• Modified profile storage logic to skip saving results when CODSPEED_PROFILE_FOLDER is not configured
• Removed unused time import from plugin.py

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
tests/test_format_time.py	New test file covering various time formatting scenarios across all supported units
src/pytest_codspeed/plugin.py	Updated to skip profile storage when profile_folder is None and removed unused import
src/pytest_codspeed/instruments/walltime.py	Added format_time() function and integrated it into benchmark table display

Comments suppressed due to low confidence (1)

src/pytest_codspeed/instruments/walltime.py:1

• Corrected comment on line 408 from 'Less than 1 millisecond' to 'Less than 1 second'.

from __future__ import annotations

---

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[codspeed-hq]

CodSpeed Performance Report

Merging #97 will degrade performances by 16.4%

_{Comparing feat/improve-local-walltime (bb84077) with master (a71ec50)}

Summary

⚡ 20 improvements
❌ 16 (👁 16) regressions
✅ 131 untouched

Benchmarks breakdown

	Mode	Benchmark	BASE	HEAD	Change
👁	WallTime	test_iir_filter_process	2.6 µs	2.7 µs	-3.89%
👁	WallTime	test_iir_filter_set_coefficients[a_coeffs0-b_coeffs0]	818.9 ns	837.2 ns	-2.19%
👁	WallTime	test_make_lowpass	5.4 µs	5.5 µs	-2.07%
⚡	WallTime	test_color[graph0-3]	27.2 µs	26.6 µs	+2.27%
👁	WallTime	test_combination_lists[4-2]	3.8 µs	4 µs	-4.19%
⚡	WallTime	test_depth_first_search[4]	32.6 µs	31.6 µs	+3.06%
⚡	WallTime	test_generate_all_combinations[5-4]	10.4 µs	9.9 µs	+4.66%
⚡	WallTime	test_generate_parenthesis[3]	11.8 µs	11.1 µs	+6.93%
👁	WallTime	test_generate_sum_of_subsets_soln[nums0-9]	22.2 µs	23.4 µs	-5.23%
⚡	WallTime	test_hamilton_cycle[graph0]	25.5 µs	23.3 µs	+9.7%
⚡	WallTime	test_match_word_pattern[aba-GraphTreesGraph]	96.9 µs	94.2 µs	+2.87%
👁	WallTime	test_minimax[scores0]	7.7 µs	8.1 µs	-5.07%
👁	WallTime	test_open_knight_tour[1]	3.9 µs	4 µs	-2.61%
⚡	WallTime	test_sum_squares_slow	328.4 µs	280.2 µs	+17.18%
👁	WallTime	test_iterative_fibo_10	1.3 µs	1.4 µs	-4.41%
⚡	WallTime	test_recursive_fibo_10	44.6 µs	42.7 µs	+4.58%
⚡	WallTime	test_count_even[count_even_slow]	1.3 ms	1.2 ms	+7.34%
⚡	WallTime	test_sum_of_squares[sum_of_squares_sum_comprehension_product]	199.2 µs	187.4 µs	+6.3%
👁	WallTime	test_sum_of_squares[sum_of_squares_sum_labmda_product]	246.2 µs	261.7 µs	-5.95%
⚡	WallTime	test_array_alloc[100]	1.1 µs	1 µs	+3.11%
...	...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

[GuillaumeLagrange]

lgtm