Performance Testing

- Added import and export to the testing.  As an extension mechanism, it needs
  to perform well.

performance/.gitignore

@@ -1,2 +1,3 @@
 *.data
 *.rc
+export.json

performance/run_perf

@@ -2,7 +2,7 @@
 
 echo 'Performance: setup'
 echo '  - This step will take several minutes'
-rm -f ./pending.data ./completed.data ./undo.data perf.rc
+rm -f ./pending.data ./completed.data ./undo.data ./backlog.data perf.rc
 ./load
 
 # Run benchmarks.
@@ -26,6 +26,14 @@ echo '  - task add...'
 ../src/task rc.debug:1 rc:perf.rc add >/dev/null 2>&1
 ../src/task rc.debug:1 rc:perf.rc add This is a task with an average sized description length project:P priority:H +tag1 +tag2 2>&1 | grep "Perf task"
 
+echo '  - task export...'
+../src/task rc.debug:1 rc:perf.rc export >/dev/null 2>&1
+../src/task rc.debug:1 rc:perf.rc export 2>&1 >export.json | grep "Perf task"
+
+echo '  - task import...'
+rm -f ./pending.data ./completed.data ./undo.data ./backlog.data
+../src/task rc.debug:1 rc:perf.rc import export.json 2>&1 | grep "Perf task"
+
 echo 'End'
 exit 0