Why is 'go build' so slow after upgrading to Go 1.3?

"Building with Go" Slowdown After Version Upgrade

Following an upgrade from Go 1.2.1 to 1.3 on Windows 7 (64-bit), users have reported significant performance degradation during "go build" operations, with execution times increasing from around 4 to over 45 seconds.

Possible Cause:

This slowdown may be attributed to the recompilation of dependencies each time "go build" is executed.

Solution:

To resolve this issue, consider the following:

• Rebuilding Dependencies:
  Use "go install -a mypackage" to rebuild all dependencies. This ensures that outdated or incompatible versions are not affecting the build process.
• Removing Old Object Files:
  Delete the $GOPATH/pkg directory to remove any remaining object files that may be causing conflicts.
• Using the -x Flag:
  Adding the "-x" flag to the "go build" command will display the compilation process. This can help identify any version mismatches or other errors that may be slowing down the build.

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