启动 Homebrew 的并行下载功能

#https://brew.sh/2025/08/05/homebrew-4.6.0/
export HOMEBREW_DOWNLOAD_CONCURRENCY=auto

➜ brew install octave
==> Auto-updating Homebrew...
Adjust how often this is run with `$HOMEBREW_AUTO_UPDATE_SECS` or disable with
`$HOMEBREW_NO_AUTO_UPDATE=1`. Hide these hints with `$HOMEBREW_NO_ENV_HINTS=1` (see `man brew`).
==> Auto-updated Homebrew!
==> Updated Homebrew from f037420b415 to 1c625aa2a06.
Updated 3 taps (tombener/tap, homebrew/core and homebrew/cask).
==> New Formulae
pyrefly: Fast type checker and IDE for Python
==> New Casks
boss: AI-powered workspace for complex business operations

You have 6 outdated formulae and 2 outdated casks installed.

==> Fetching downloads for: octave
✔︎ Bottle Manifest octave (9.4.0_1)
✔︎ Bottle Manifest eigen (3.4.0_1)
✔︎ Bottle Manifest arpack (3.9.1_1)
✔︎ Bottle arpack (3.9.1_1)
✔︎ Bottle Manifest jbig2dec (0.20)
✔︎ Bottle Manifest libidn (1.43)
✔︎ Bottle libidn (1.43)
✔︎ Bottle Manifest ghostscript (10.05.1)
✔︎ Bottle ghostscript (10.05.1)
✔︎ Bottle Manifest epstool (3.09)
✔︎ Bottle epstool (3.09)
✔︎ Bottle Manifest fig2dev (3.2.9a)
✔︎ Bottle fig2dev (3.2.9a)
✔︎ Bottle Manifest fltk (1.4.4)
✔︎ Bottle Manifest gl2ps (1.4.2)
✔︎ Bottle gl2ps (1.4.2)
✔︎ Bottle Manifest glpk (5.0)
✔︎ Bottle Manifest graphicsmagick (1.3.45_1)
✔︎ Bottle Manifest libheif (1.20.2)
✔︎ Bottle Manifest libaec (1.1.4)
✔︎ Bottle Manifest hdf5 (1.14.6)
✔︎ Bottle Manifest plotutils (2.6_1)
✔︎ Bottle Manifest pstoedit (4.02)
✔︎ Bottle Manifest qhull (2020.2)
✔︎ Bottle Manifest qrupdate (1.1.2_15)