12.12 Fast-Load Serialization
The bindings documented in this section are provided by the racket/fasl library, not racket/base or racket.
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The s-exp->fasl function serializes v to a byte
string, printing it directly to out if out is an
output port or return the byte string otherwise. The
fasl->s-exp function decodes a value from a byte string
(supplied either directly or as an input port) that was encoded with
s-exp->fasl.
The v argument must be a value that could be quoted as a literal, because s-exp->fasl essentially uses (compile `',v) to encode the value using Racket’s built-in fast-load format for bytecode.
The byte-string encoding produced by s-exp->fasl is specific to a version of Racket. That is, the resulting byte string can be decoded back to v only using the same version with which it was encoded.
Examples: |
| > (define fasl (s-exp->fasl (list #("speed") 'racer #\!))) |
| > fasl |
#"#~\0035.1\1\0\0\0\1\0\0\0\0\36\0\0\0\237$\24i\237$\20\0\20\0\25_\20\1\6\5\5speedAracer\a!" |
| > (fasl->s-exp fasl) |
'(#("speed") racer #\!) |