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| Crunching, level by level |
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| Level 0 :: No compression |
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No compression done. Basically a content transfer/append from input(s) to output.
This level is mainly used for tracking down problems occuring to scripts after been
shoved through the variable substitution engine.
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| Level 1 :: Comment removal |
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ESC removes empty lines (\r?\n)+, single and multi-line and single-line comments
(//..., /* ... */) and trailing whitespace. [ \t]+\r?\n
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| Level 2 :: Whitespace removal |
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Any occurance of space and tabs (\s\t\r) are removed from the infile(s).
This is the default compression-level if none is supplied.
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| Level 3 :: Newline removal |
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Newlines (\r?\n) are removed. ESC do not like sloppy written code and will at
this level punish you for it by producing a very tight, human unreadable,
uninpretable chunk o' chars :) So remember, *ALWAYS* terminate your
statements with semi-colons (';'). If you come from a C/C++ bg you have
probably been taught this the hard way by an evercroaking compiler.
If not for getting your script thru ESC, so start doing it anyway for
good ol' programming style.
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| Level 4 :: Variable substitution |
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(variable substitution mode, identical to options '-l 3 -$')
Additionally to level 3, ESC will run your script(s) through the variable substitution engine.
This will certainly break your scripts at the first try, but with a little fiddling around and once
you understand how the substitution scheme works, this thing rule since it will save you another
extra 5-20% bytewise depending on your coding style. Variable-names less than 3 chars are not affected.
Before you try running ESC with variable substitution enabled, I advice you to carefully read the other
sections in this manual about the pros and cons, thinking session-dependencies and the known caveats of
variable crunching with ESC. Your specific situation in terms of namespaces, shared variables or the
design/architecture of your scripts may make it difficult, even impossible to combine with this
technique whereas you'll have to stick with level 3.
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