Thanks, all. These suggestions will get me close enough for what I need. Fortunately, this data isn't required for anything essential. I appreciate all the help.
On 4/20/06, Ashwin Mathew <[EMAIL PROTECTED]> wrote: > Try this: http://martin.nobilitas.com/java/sizeof.html > The empirical formula derived there indicates that string memory is > 38+/-2 + 2*(string length) bytes. In my own tests on JDK 1.4.2_09 I got > something similar: 40 + 2*(string length) bytes when length>2. For > length 0 to 2, the size works out to just 40 bytes. > > That said, as Nick mentions, if all that you're trying to do is get an > idea of the relative memory occupied by different strings, rather than > the actual physical memory (which, as discussed in the link above, can > be determined only empirically, not precisely), you might be best off > just checking the length. > > -----Original Message----- > From: Nick de Voil [mailto:[EMAIL PROTECTED] > Sent: Wednesday, April 19, 2006 9:47 PM > To: CF-Talk > Subject: Re: Get String Byte Size > > > Anyone have any quick code to retrieve the number of bytes in a string > > > /without/ writing the string to a file first? I'm trying to do a > > little debugging and I'd like to know the size of a string that is > > being returned to the browser. > > The number of bytes occupied in the application's memory by the Java > String object is probably not the same as the number of bytes occupied > by the same string in the HTTP response. > > I could be wrong on some points below but I'm sure others will correct > me if so (Paul?) > > As I understand it, a Java program such as CF always stores characters > internally using UCS-2 encoding, i.e. 2 bytes per character. In > addition, the String object will include 20 or 30 extra bytes for > storing the length of the string etc. > > I believe that CF's default behaviour is to encode HTTP responses using > UTF-8 encoding, i.e. 1 byte per character if you're only using ASCII > characters, and of course the extra bytes used by the String object > won't be there either. > > So let's say your string is "Rob". > > - In CF the Len() function gives you 3. > > - The size of the Java object - even if you could work it out, which is > next to impossible in Java - would be 6 + the extra bytes, maybe 40 or > more. > > - But in the HTTP response it would probably be 3. > > So, if I've understood your question correctly and it's the HTTP > response you're interested in, just using Len() in CF will give you the > best answer. > > Nick > > > > > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:238250 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
