在编写org文档的时候，有时想看看导出效果，快捷键“C-c C-e” 会执行
(org-export-dispatch &optional ARG)
函数，该函数根据你给的参数导出确定的文档格式。在导出成pdf格式时，第一步是转换成对应的.tex文件，然后再调用你机器上的latex系统对其进行编译，在windows上latex的编译速度较慢，这就造成了在导出编译的过程中 emacs 卡死不能编辑的现象，
想问一下各位大佬有没有解决方案？
导出一般格式的文档pdf
(org-latex-export-to-pdf &optional ASYNC SUBTREEP VISIBLE-ONLY
BODY-ONLY EXT-PLIST)
Export current buffer to LaTeX then process through to PDF.
If narrowing is active in the current buffer, only export its
narrowed part.
If a region is active, export that region.
A non-nil optional argument ASYNC means the process should happen
asynchronously. The resulting file should be accessible through
the ‘org-export-stack’ interface.
导出beamer形式的pdf
org-beamer-export-to-pdf is an autoloaded interactive Lisp closure in
‘ox-beamer.el’.
It is bound to , o b p.
(org-beamer-export-to-pdf &optional ASYNC SUBTREEP VISIBLE-ONLY
BODY-ONLY EXT-PLIST)
Export current buffer as a Beamer presentation (PDF).
If narrowing is active in the current buffer, only export its
narrowed part.
If a region is active, export that region.
A non-nil optional argument ASYNC means the process should happen
asynchronously. The resulting file should be accessible through
the ‘org-export-stack’ interface.
看这两个函数实际已经实现异步导出了，如果第一位参数非空就应该异步导出 ，在导出栈 org-export-stack 可以看到导出的运行情况，但我试了报错
(org-beamer-export-to-pdf 1 nil nil nil nil)
报错：
Unknown "nil" back-end: Aborting export
试试执行(org-latex-export-to-pdf t)
我测试下来没有问题
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