<div dir="ltr"><div class="gmail_extra">On Thu, Apr 25, 2013 at 10:32 PM, Johan Tibell <span dir="ltr"><<a href="mailto:johan.tibell@gmail.com" target="_blank">johan.tibell@gmail.com</a>></span> wrote:<br><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div id=":cb">If you remember where it would be great to see an example.</div></blockquote><div><br></div><div style>I'm afraid I don't remember. I spend a lot of time optimising things down to the last memory allocation, and this was one of those cases where I could keep heap allocation constant by unboxing an unpacked field repeatedly, whereas if I packed the field I was allocating a little on every iteration of whatever the loop was.</div>
<div style> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div id=":cb"> There's also NOUNPACK nowadays so you can opt out in these specific cases.</div></blockquote>
<div><br></div><div style>Oh yes, I have no problem with this becoming the default behaviour. All I was doing was confirming that it is not always a win "in the wild". </div></div></div></div>