> Interpreters, which read the program line by line as it runs Byte code interpreters do that? That would be surprising. Programs are represented with 'lines'

> Interpreters, which read the program line by line as it runs Byte code interpreters do that? That would be surprising. Programs are represented with 'lines' in byte code? Things he wants, let's look at SBCL, a Common Lisp implementation (see http://sbcl.org http://sbcl.org ): > compile short bits to native code quickly at runtime -> that's done by default > identify whether a section is getting optimized -> we tell the compiler and the compiler gives us feedback on the optimizations performed or missed > know anything about the native code that’s being run in a benchmark -> we can disassemble it, some information can be asked > statically require that a given section can & does get optimized -> done via declarations and compilation qualities > compile likely sections in advance to skip warmup -> by default > bonus: ship binaries with fully-compiled programs -> dump the data (which includes the compiled code) to an executable