<div class="gmail_quote">On Thu, Feb 19, 2009 at 1:09 PM, Neil Van Dyke <<a href="mailto:neil@neilvandyke.org">neil@neilvandyke.org</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I've found logging as sexps to be somewhat more convenient than strings, at least for debugging info. However, I'd want the formatting of sexps to strings to be done immediately, not asynchronously, lest values change in the meantime and compromise my debug info. </blockquote></div>Hi Neil, can you elaborate a bit more on how would sexp and string differ in this case?  Assuming your sexp contains only immutable objects, I am sure how the value (and assuming you are refering to the sexp itself) would change. Thanks, yc