Hi, I developed a GWT / SmartGWT based app and deployed it on the app engine. I'm trying to optimize the performance of the app. Using firebug, I found that some static content is not returned to the client in the compressed format (even though the request header says Accept-Encoding:gzip,deflate,sdch) while other content is returned in compressed format.
For example, some of the SmartGWT js files are returned in the compressed format while others are not. All images are returned uncompressed. Here are the request / response headers for the js file which is compressed: Request URL:http://myappid.appspot.com/mydir/sc/modules/ISC_Core.js Request Method:GET Status Code:200 OK Request Headers Accept:*/* Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3 Accept-Encoding:gzip,deflate,sdch Accept-Language:en-US,en;q=0.8 Connection:keep-alive Host:myappid.appspot.com Referer:http://myappid.appspot.com/ User-Agent:Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/ 534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.16 Response Headers Cache-Control:public, max-age=600 Connection:Keep-Alive Content-Encoding:gzip Content-Length:171011 Content-Type:application/x-javascript Date:Mon, 25 Apr 2011 11:36:59 GMT ETag:"mXN4tA" Expires:Sun, 24 Apr 2011 16:25:20 GMT Server:Google Frontend Note that the response content encoding is gzip above. The original file size is about 650+KB, while the compressed size is 167KB. However, another js file from the SmartGWT package is returned uncompressed. Here are the request/response headers: Request URL:http://myappid.appspot.com/mydir/sc/modules/ISC_Grids.js Request Method:GET Status Code:200 OK Request Headers Accept:*/* Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3 Accept-Encoding:gzip,deflate,sdch Accept-Language:en-US,en;q=0.8 Connection:keep-alive Host:myappid.appspot.com Referer:http://myappid.appspot.com/ User-Agent:Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/ 534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.16 Response Headers Cache-Control:public, max-age=600 Content-Type:application/x-javascript Date:Mon, 25 Apr 2011 11:37:01 GMT ETag:"mXN4tA" Expires:Mon, 25 Apr 2011 11:47:01 GMT Server:Google Frontend Transfer-Encoding:chunked Note "Transfer-Encoding:chunked". Similarly all images are returned uncompressed: Request URL:http://myappid.appspot.com/images/myimgname.png Request Method:GET Status Code:200 OK Request Headers Accept:*/* Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3 Accept-Encoding:gzip,deflate,sdch Accept-Language:en-US,en;q=0.8 Connection:keep-alive Host:myappid.appspot.com Referer:http://myappid.appspot.com/ User-Agent:Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/ 534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.16 Response Headers Cache-Control:public, max-age=600 Connection:Keep-Alive Content-Length:113341 Content-Type:image/png Date:Mon, 25 Apr 2011 11:37:18 GMT ETag:"mXN4tA" Expires:Mon, 25 Apr 2011 11:47:18 GMT Server:Google Frontend The settings in my appengine-web.xml file are: <!-- Configure serving/caching of GWT files --> <static-files> <include path="**" /> <!-- The following line requires App Engine 1.3.2 SDK --> <include path="**.nocache.*" expiration="0s" /> <include path="**.cache.*" expiration="365d" /> <exclude path="**.gwt.rpc" /> </static-files> My GAE version is 1.4.3. GWT version is 2.1. Can some help me understand why the compression behavior is inconsistent, and what I can do to fix it? I'm just beginning to get familiar with GWT / GAE. I'll really appreciate any help on this. Thanks. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
