diff --git a/Makefile.MinGW b/Makefile.MinGW
index 637f2e217..fbf25f8ae 100644
--- a/Makefile.MinGW
+++ b/Makefile.MinGW
@@ -32,9 +32,8 @@ SRCF77 = indexx.f gen65.f chkmsg.f \
 	unpackmsg.f unpacktext.f astro.f azdist.f coord.f dcoord.f \
 	deg2grid.f dot.f ftsky.f geocentric.f GeoDist.f grid2deg.f \
 	moon2.f MoonDop.f sun.f toxyz.f pfxdump.f \
-	ccf65.f trimlist.f chkhist.f decode1a.f \
-	fil6521.f twkfreq.f decode65b.f \
-	afc65b.f fchisq.f ccf2.f
+	ccf65.f trimlist.f chkhist.f decode1a.f f77_wisdom.f \
+	fil6521.f twkfreq.f decode65b.f afc65b.f fchisq.f ccf2.f 
 
 SRC2F77 = four2a.f filbig.f
 
diff --git a/four2a.f b/four2a.f
index 9f2a095b5..7e022a48e 100644
--- a/four2a.f
+++ b/four2a.f
@@ -1,4 +1,4 @@
-      SUBROUTINE FOUR2a (a,nfft,NDIM,ISIGN,IFORM)
+      subroutine four2a(a,nfft,ndim,isign,iform)
 
 C     IFORM = 1, 0 or -1, as data is
 C     complex, real, or the first half of a complex array.  Transform
@@ -18,13 +18,15 @@ C     to -1.  In the N array, N(1) must be the true N(1), not N(1)/2+1.
 C     The transform will be real and returned to the input array.
 
       parameter (NPMAX=100)
+      parameter (NSMALL=16384)
       complex a(nfft)
       complex aa(32768)
       integer nn(NPMAX),ns(NPMAX),nf(NPMAX),nl(NPMAX)
-      real*8 plan(NPMAX)                   !Should be i*8
+      real*8 plan(NPMAX)             !Actually should be i*8, but no matter
       data nplan/0/
       include 'fftw3.f'
-      save
+      common/patience/npatience
+      save plan,nplan,nn,ns,nf,nl
 
       if(nfft.lt.0) go to 999
 
@@ -41,12 +43,19 @@ C     The transform will be real and returned to the input array.
       nf(i)=iform
       nl(i)=nloc
 
-C  Planning: FFTW_ESTIMATE, FFTW_MEASURE, FFTW_PATIENT, FFTW_EXHAUSTIVE
+C  Planning: FFTW_ESTIMATE, FFTW_ESTIMATE_PATIENT, FFTW_MEASURE, 
+C            FFTW_PATIENT,  FFTW_EXHAUSTIVE
+C  NB: "EXHAUSTIVE" takes more or less forever, for long transforms.
       nspeed=FFTW_ESTIMATE
-      if(nfft.le.16384) nspeed=FFTW_MEASURE
-      nspeed=FFTW_MEASURE
-      if(nfft.le.32768) then
-         do j=1,nfft
+      if(npatience.eq.1) nspeed=FFTW_ESTIMATE_PATIENT
+      if(npatience.eq.2) nspeed=FFTW_MEASURE
+      if(npatience.eq.3) nspeed=FFTW_PATIENT
+      if(npatience.eq.4) nspeed=FFTW_EXHAUSTIVE
+      nspeed=nspeed + FFTW_THREADSAFE+FFTW_USE_WISDOM
+      if(nfft.le.NSMALL) then
+         jz=nfft
+         if(iform.eq.0) jz=nfft/2
+         do j=1,jz
             aa(j)=a(j)
          enddo
       endif
@@ -66,13 +75,16 @@ C  Planning: FFTW_ESTIMATE, FFTW_MEASURE, FFTW_PATIENT, FFTW_EXHAUSTIVE
       endif
       call sleep_msec(0)
       i=nplan
-      if(nfft.le.32768) then
-         do j=1,nfft
+      if(nfft.le.NSMALL) then
+         jz=nfft
+         if(iform.eq.0) jz=nfft/2
+         do j=1,jz
             a(j)=aa(j)
          enddo
       endif
 
- 10   call sleep_msec(0)
+ 10   continue
+      call sleep_msec(0)
       call sfftw_execute_(plan(i))
       call sleep_msec(0)
       return
diff --git a/ftn_init.F90 b/ftn_init.F90
index b40f1f021..a91f700e6 100644
--- a/ftn_init.F90
+++ b/ftn_init.F90
@@ -18,7 +18,7 @@
 !   25  meas25.dat
 !   26  tmp26.txt
 !   27  dphi.txt
-!   28  
+!   28  fftw_wisdom.dat
 !   29  debug.txt
 !------------------------------------------------ ftn_init
 subroutine ftn_init
@@ -140,6 +140,12 @@ subroutine ftn_init
   open(27,file=appdir(:iz)//'/dphi.txt',status='unknown')
 #endif
 
+  open(28,file='fftw_wisdom.dat',status='unknown')
+  call import_wisdom_from_file(isuccess,28)
+  close(28)
+  if(isuccess.ne.0) write(*,1000) 
+1000 format('Using optimized FFTs.')
+
 #ifdef CVF
   open(29,file=appdir(:iz)//'/debug.txt',status='unknown',                 &
        share='denynone')
diff --git a/libfftw3f.a b/libfftw3f.a
index c1d49dc19..6e1ea3a46 100644
Binary files a/libfftw3f.a and b/libfftw3f.a differ