UTF-8, probably it's impossible to know due the broad range of
possible values, but maybe there is a way to give hints for latin,
asian, western european charsets?
+
+ * Check/benchmark buffered vs unbuffered IO and possibly use mmap.
+ There are lots of code in plugin issuing one read(2) syscall for
+ small things like 4 bytes. Setting a proper buffer size (e.g. setvbuf)
+ and reading all at once would be better performance-wise. Another option
+ is to write the common code for handling sigbus and use mmap instead.
+ Check also whether pread/preadv/readv would be an option for some plugins.
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