Now with logging off it is around 4 seconds. A major increase. -----Original Message----- From: Hatzenbeler, Tim [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 27, 2002 6:53 PM To: 'POI Users List' Subject: RE: Anyone have performance problems?
Just a quick question, How much faster is it with logging off? You said it took 4 1/2 minutes before, for a 1000 rows i believe.. What was the speed increase with logging off? Thanks, tim > -----Original Message----- > From: Andrew C. Oliver [SMTP:[EMAIL PROTECTED]] > Sent: Thursday, June 27, 2002 3:42 PM > To: POI Users List > Subject: Re: Anyone have performance problems? > > Phew... Glad to hear it. That scared me. > > This also points out an important bug. Its not clear what logging is > for or how serious a performance drain it is. So I've > corrected this. > > -Andy > > > Torbert Brian IT56 wrote: > > >Well you nailed it right off the bat. I did have the logging running. > Once > >turned off it was an unbelieveable difference. I had a feeling once > turned > >off it would speed things up a bit, but I didnt realize HOW much it > would. > >Thanks for your help. > > > >Brian > > > >-----Original Message----- > >From: Andrew C. Oliver [mailto:[EMAIL PROTECTED]] > >Sent: Tuesday, June 25, 2002 1:58 PM > >To: POI Users List > >Subject: Re: Anyone have performance problems? > > > > > >Okay, lets start from the top: > > > >1. Do you have logging on -- POI's logging facillities are intended only > >for autopsies? > >2. What is your VM memory set at? > >3. Are you sure you're not running in swap memory? > > > >For reference, I ran: > > > >http://jakarta.apache.org/poi/javadocs/javasrc/org/apache/poi/hssf/dev/HS > SF_ > >java.html#HSSF > > > >as follows: > > > >$ java org.apache.poi.hssf.dev.HSSF ".\test.xls" write > >Write mode > >1762 ms generation time > > > >-- It writes 300 rows of 50 cells, styled, etc. > > > >This is on a PIII laptop, jdk 1.3.1_02 and ~768mb and a recent nightly > >build of POI. (Notice this test > >runs in the default heapsize.) -- Please try this test and let me know > >your results. > > > >-Andy > > > >-andy > > > >Torbert Brian IT56 wrote: > > > > > > > >><CODESNIPIT> > >>int nextCellNumber = 0; > >>// Create first row and put some cells in it. Rows are 0 based. > >>HSSFRow row = sheet.createRow((short)0); > >> > >>//Display the header columns > >>for (int i=0; i<table.getColumnHeaderCodes().length; i++) > >>{ > >> txc.getPerfTimer().startTiming("buildCell inner: "); > >> String[] s = table.getColumnHeaderCodes(); > >> HSSFCell cell = row.createCell((short)nextCellNumber++); > >> //set style of cell > >> cell.setCellStyle(headerStyle); > >> // load cell > >> cell.setCellValue(s[i]); > >> txc.getPerfTimer().endTiming(); > >>} > >></CODESNIPIT> > >> > >>I am using poi 1.5.0 and running the code on a Pentium 3 500mhz w512mb > RAM. > >>This is just a testing server our production server will be faster. In > the > >>code snipit above table is an object which holds a row of Header Columns > >> > >> > >and > > > > > >>then rows of data. Here I have just included the print out of the > header > >>column. The rows are printed out similarly but with a different Cell > >> > >> > >Style. > > > > > >>I have wrapped the code in the for loop with a timer and ran a test > which > >>included 3 ColumnHeaders. The results were: > >> > >>buildCell inner: : 71 milliseconds > >>buildCell inner: : 90 milliseconds > >>buildCell inner: : 110 milliseconds > >> > >>So to build the first Row in the workbook it took around 270 > milliseconds. > >>if you multiply that by 1000 rows your talking about 4.5 mins. Sure > enough > >>when I throw a count around the whole thing i was seeing about 4 mins. > Can > >>anyone see anything I am doing wrong that would cause this slow down? > 90 > >>milliseconds to build a cell seems high. > >> > >>Thanks > >> > >>Brian > >> > >>-----Original Message----- > >>From: Andrew C. Oliver [mailto:[EMAIL PROTECTED]] > >>Sent: Monday, June 24, 2002 6:17 PM > >>To: 'POI Users List' > >>Subject: RE: Anyone have performance problems? > >> > >> > >>Look here for an idea of how fast I (a/o we) expect things to run: > >> > >>http://jakarta.apache.org/poi/tests/junit/ > >> > >>If there are special cases that are slower, I'd like to know. Please > >>submit some unit tests. Perhaps we should start putting performance > >>constraints on them. (an assert at the bottom that X seconds haven't > >>passed perhaps based on some temporal adjustment by machine). > >> > >>The "reference" machine (in that its the one that generated the results) > >>is a AMD Athlon T-Bird 900mhz w/512mb -- if you're running something > >>slower/smaller of course things make take longer, but I think 3-4 > >>minutes for 4000 cells is probably way out there. I'd like to see some > >>code. > >> > >>-Andy > >> > >>On Mon, 2002-06-24 at 17:54, Hoffman, Jason wrote: > >> > >> > >> > >> > >>>Yea, that does seem long. Our biggest problem has been OutOfMemory > >>> > >>> > >>> > >>> > >>errors, > >> > >> > >> > >> > >>>which were resolved by adding the java commmand line option to increase > >>> > >>> > >>> > >>> > >>the > >> > >> > >> > >> > >>>heap size. You might try that, yours may be slow because of memory > >>>constraints? > >>> > >>>-----Original Message----- > >>>From: Torbert Brian IT56 [mailto:[EMAIL PROTECTED]] > >>>Sent: Monday, June 24, 2002 4:51 PM > >>>To: 'POI Users List' > >>>Subject: Anyone have performance problems? > >>> > >>> > >>>Hi - > >>> I was wondering what the typical time people experience when > >>>creating a workbook of about 1000 rows and about 4 columns. This is > >>> > >>> > >>> > >>> > >>taking > >> > >> > >> > >> > >>>around 3-4 mins for us to generate. It seems a little long. Is this > >>>normal? > >>> > >>>Thanks > >>> > >>>Brian > >>> > >>>-- > >>>To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > >>>For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > >>> > >>>-- > >>>To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > >>>For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > >>> > >>> > >>> > >>> > >>> > > > > > > > > > >-- > >To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > >For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > > > >-- > >To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > >For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > > > > > > > > > > > > > -- > To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential or privileged information. Any unauthorized review; use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy the message. -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
