id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	difficulty
1219	read-char could be better optimized	sjamaan		"Currently, there are two issues with {{{read-char}}}:

* It calls {{{##sys#read-char/port}}}, which is itself a CPS procedure (consuming needless CPU cycles and stack).  This will get rewritten in {{{c-platform.scm}}} to a direct call to {{{##sys#read-char/port}}} with fixed argcount. Is omitting argcount check really that much faster? Why not rewrite it to the complete body of {{{##sys#read-char/port}}} instead?
* Equally important, the {{{##sys#check-input-port}}} call in {{{##sys#read-char/port}}} is not being specialized, even though there's an entry in {{{types.db}}}(!)  This also causes an extra needless CPS call, because it can (and should) be inlined.

Once this is fixed, we should run the {{{slatex}}}, {{{kernwyk-wc}}} and {{{kernwyk-cat}}} benchmarks to see how much of an improvement this is."	enhancement	closed	major	5.0	scrutinizer	4.9.x	fixed