7.2 Input/Output system extensions
fast-read-char fast-unread-char fast-write-char fast-write-string fast-read-byte fast-write-byteThese macros expand into in-line code without any function calls, and for I/O operations involving simple streams, they are faster than their functional counterparts. If the input or output stream is a composite stream, the performance of these macros is equivalent to the performance of the related Common Lisp functions (
write-byte). A composite stream is a stream that is built up from layers of simple streams.
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