perf: fetch abbreviated metadata

[KSXGitHub]

This simple change surprisingly improves performance by about 10%.

cargo run --bin=integrated-benchmark -- -s frozen-lockfile HEAD main -V -D ./crates/testing-utils/src/fixtures/big/

Benchmark 1: pacquet@HEAD
  Time (mean ± σ):      3.036 s ±  0.291 s    [User: 14.522 s, System: 17.387 s]
  Range (min … max):    2.673 s …  3.516 s    10 runs
 
Benchmark 2: pacquet@main
  Time (mean ± σ):      3.137 s ±  0.275 s    [User: 14.616 s, System: 17.753 s]
  Range (min … max):    2.584 s …  3.492 s    10 runs
 
Summary
  pacquet@HEAD ran
    1.03 ± 0.13 times faster than pacquet@main

It is still not as fast as pnpm. It is likely that there are other optimizations pnpm did that I'm not aware of.

[github-actions]

Micro-Benchmark Results

Linux

group                          main                                   pr
-----                          ----                                   --
tarball/download_dependency    1.00      7.2±0.33ms   599.2 KB/sec    1.00      7.2±0.22ms   600.9 KB/sec

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.75%. Comparing base (5dcb687) to head (51bb919).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #241      +/-   ##
==========================================
+ Coverage   92.68%   92.75%   +0.06%     
==========================================
  Files          59       59              
  Lines        2872     2884      +12     
==========================================
+ Hits         2662     2675      +13     
+ Misses        210      209       -1     

Flag	Coverage Δ
	92.75% <100.00%> (?)

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[github-actions]

Integrated-Benchmark Report (Linux)

Scenario: Frozen Lockfile

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
pacquet@HEAD	131.3 ± 11.0	116.6	150.8	1.01 ± 0.12
pacquet@main	129.5 ± 10.2	110.3	145.8	1.00

BENCHMARK_REPORT.json

{
  "results": [
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      "command": "pacquet@HEAD",
      "mean": 0.1313476245857143,
      "stddev": 0.010983900584432285,
      "median": 0.12713331780000003,
      "user": 0.06233629428571428,
      "system": 0.20832744285714283,
      "min": 0.11660323730000001,
      "max": 0.15081100630000002,
      "times": [
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      "exit_codes": [
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    {
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      "mean": 0.12946160298750004,
      "stddev": 0.010204349089783524,
      "median": 0.1276203058,
      "user": 0.0619152675,
      "system": 0.21021442499999998,
      "min": 0.1103118813,
      "max": 0.14576961630000002,
      "times": [
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      "exit_codes": [
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}