Hi, After trying the following with no significant improvement - remove Norton 360 anti-virus - defrag hard file - upgrade cygwin and java boot jre - remove the search index attribute from all files on the entire hard file - turned off some processes that seemed to be using disk cycles: Acronis True Image, Firefox, Skype. I installed an SSD. Things are much better.
WinSat disk: > Average Read Time with Sequential Writes 0.313 ms > Latency: 95th Percentile 0.410 ms > Average Read Time with Random Writes 0.438 ms Numbers from before: 22.161 ms, 123.878 ms, 20.880 ms Make clean now takes about a minute, before it was anywhere from 15 to 30 minutes. Make all now runs in 49 min. Here is the build time summary: 00:01:12 corba 00:03:41 demos 00:05:11 docs 00:05:35 hotspot 00:05:39 images 00:01:04 jaxp 00:04:28 jaxws 00:19:38 jdk 00:01:58 langtools 00:00:37 nashorn 00:49:16 TOTAL This is with Norton 360 real time virus checking on, though configured so most build related directories are ignored during real time checking. Disabling real time checking lowered build time by about another 4 min. Turning off Process Explorer (which I use for cpu/memory/disk monitoring) and Norton 360's performance checking lowered the build time by only another minute. Before make all was taking anywhere from a little over an hour to up to 2.5 hours. Here are the prior build times using the prior disk (probably with Norton 360 disabled): 00:01:43 corba 00:05:55 demos 00:12:40 docs 00:07:52 hotspot 00:10:50 images 00:02:23 jaxp 00:05:28 jaxws 00:45:09 jdk 00:02:27 langtools 00:01:06 nashorn 01:35:49 TOTAL Observation: The 2 cores are now usually fully saturated during the build (thanks to not being as IO bound) so will start thinking about a 4 core machine :-) Some things I learned about SSDs: - Leave 25-30% unallocated (non-partitioned) so the technology can work properly. - Make sure Win 7 has TRIM enabled. In my case Win7 did enable it so shouldn't be an issue. See: http://www.ghacks.net/2010/09/14/verify-that-trim-is-enabled-in-windows-7/ - This looks like a good site for SSD info: http://www.thessdreview.com Some things I noticed along the way in the process of trying to fix this: - native Fedora on the same hardware runs much faster - Fedora in a VirtualBox VM on Win7 runs about as slow as the cygwin Pete