February 5, 2018
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I've been testing a version of `;` that eliminates tail calls.
If you'd like to play with this, here's the code (replace the
existing `t-;` in `literate/Rx.md` and rebuild).

~~~
: tco
i lifelisu
r Heap
d 2
i lifeswst
r _packedjump
i podrre..

: t-;
i lifelisu
r Heap
d 2
i lifeeqlicc
r _packedcall
r tco
i lilica..
r _ret
r comma:opcode
i lilistre
d 0
r Compiler
~~~

So far I've not seen any reason to merge this into the standard
image. I'll do more profiling, but the early results aren't
showing me any big gains in performance or space.

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