Index: /branches/eam_branch_20080719/psphot/src/psphotModelBackground.c
===================================================================
--- /branches/eam_branch_20080719/psphot/src/psphotModelBackground.c	(revision 18791)
+++ /branches/eam_branch_20080719/psphot/src/psphotModelBackground.c	(revision 18792)
@@ -135,4 +135,6 @@
     psF32 **modelStdevData = modelStdev->image->data.F32;
 
+    // XXXX we can thread this here by running blocks in parallel
+
     // measure clipped median for subimages
     psRegion ruffRegion = {0,0,0,0};
Index: /branches/eam_branch_20080719/psphot/src/psphotSignificanceImage.c
===================================================================
--- /branches/eam_branch_20080719/psphot/src/psphotSignificanceImage.c	(revision 18791)
+++ /branches/eam_branch_20080719/psphot/src/psphotSignificanceImage.c	(revision 18792)
@@ -12,4 +12,6 @@
     // smooth the image and weight map
     psTimerStart ("smooth");
+
+    // XXX we can a) choose fft to convolve if needed and b) multithread fftw
 
     bool status_x, status_y;
@@ -94,4 +96,5 @@
     psMetadataAddF32  (recipe, PS_LIST_TAIL, "SIGNIFICANCE_SCALE_FACTOR", PS_META_REPLACE, "Signicance scale factor", factor);
 
+    // XXX multithread this if needed
     for (int j = 0; j < smooth_im->numRows; j++) {
         for (int i = 0; i < smooth_im->numCols; i++) {
Index: /branches/eam_branch_20080719/psphot/src/psphotSubtractBackground.c
===================================================================
--- /branches/eam_branch_20080719/psphot/src/psphotSubtractBackground.c	(revision 18791)
+++ /branches/eam_branch_20080719/psphot/src/psphotSubtractBackground.c	(revision 18792)
@@ -90,4 +90,5 @@
 
     // subtract the background model (save in backSub, if requested)
+    // XXX if needed, multithread this (fairly trivial)
     for (int j = 0; j < image->numRows; j++) {
         for (int i = 0; i < image->numCols; i++) {