我在装有 ubuntu 20.04 的新 X1 Gen 9 上和装有 ubuntu 16.04 的旧 X1 Gen 4 上编译了同一个 14000 页的文件，前者明显速度较慢（没有其他并行的繁重任务）。下面是一些详细信息。
您有什么想法或建议来解决这个问题吗？
先感谢您。
Gen 9:
real 14m23,594s
user 1m57,165s
sys 12m19,631s
pdfTeX 3.14159265-2.6-1.40.20 (TeX Live 2019/Debian)
kpathsea version 6.3.1
Copyright 2019 Han The Thanh (pdfTeX) et al.
There is NO warranty. Redistribution of this software is
covered by the terms of both the pdfTeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the pdfTeX source.
Primary author of pdfTeX: Han The Thanh (pdfTeX) et al.
Compiled with libpng 1.6.37; using libpng 1.6.37
Compiled with zlib 1.2.11; using zlib 1.2.11
Compiled with xpdf version 4.01
vs Gen 4:
real 2m15.146s
user 2m9.087s
sys 0m5.726s
pdfTeX 3.14159265-2.6-1.40.18 (TeX Live 2017/Debian)
kpathsea version 6.2.3
Copyright 2017 Han The Thanh (pdfTeX) et al.
There is NO warranty. Redistribution of this software is
covered by the terms of both the pdfTeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the pdfTeX source.
Primary author of pdfTeX: Han The Thanh (pdfTeX) et al.
Compiled with libpng 1.6.29; using libpng 1.6.29
Compiled with zlib 1.2.8; using zlib 1.2.8
Compiled with poppler version 0.41.0