RFC: Increase buffer size

[cgzones]

Tested against cov-analysis-linux64-2022.06.tar.gz (1.2G) with /tmp mounted on a tmpfs:

$ hyperfine -w 1 -m 10 -c 'rm -Rf /tmp/benchtest/*' './target/release/examples/uncompress_tool uncompress-archive cov-analysis-linux64-2022.06.tar.gz /tmp/benchtest true'
Benchmark 1: ./target/release/examples/uncompress_tool uncompress-archive cov-analysis-linux64-2022.06.tar.gz /tmp/benchtest true
  Time (mean ± σ):      9.516 s ±  0.053 s    [User: 7.088 s, System: 2.401 s]
  Range (min … max):    9.462 s …  9.626 s    10 runs

$ hyperfine -w 1 -m 10 -c 'rm -Rf /tmp/benchtest/*' './target/release/examples/uncompress_tool uncompress-archive cov-analysis-linux64-2022.06.tar.gz /tmp/benchtest true'
Benchmark 1: ./target/release/examples/uncompress_tool uncompress-archive cov-analysis-linux64-2022.06.tar.gz /tmp/benchtest true
  Time (mean ± σ):      8.055 s ±  0.027 s    [User: 6.386 s, System: 1.643 s]
  Range (min … max):    8.008 s …  8.085 s    10 runs

[coveralls]

Pull Request Test Coverage Report for Build 3429684561

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.8%) to 85.57%

---

Files with Coverage Reduction	New Missed Lines	%
../../../.cargo/registry/src/github.com-1ecc6299db9ec823/futures-util-0.3.25/src/sink/feed.rs	1	94.44%
../../../.cargo/registry/src/github.com-1ecc6299db9ec823/futures-channel-0.3.25/src/mpsc/mod.rs	2	90.41%

Totals
Change from base Build 3331708289:	-0.8%
Covered Lines:	338
Relevant Lines:	395

---

💛 - Coveralls

[otavio]

Did you compare the memory use? This might impact embedded devices, hence my question.

[cgzones]

time(1) shows Maximum resident set size (kbytes) of 7852 for both.
heaptrack(1) shows peak RSS (including heaptrack overhead) of 10.79M for both.

[otavio]

Can you add an entry on CHANGES file before merging?

[otavio]

We might need to raise the MSRV due to Darwin. Are you aware of any possible cause of this error?