pyproj.transform() 2.2.0 running 11,000 times slower than pyproj.transform() 1.9.5.1

[wrwetzel]

Code Sample, a copy-pastable example if possible

import pyproj
from itertools import repeat
import sys
import time

wgs84     = pyproj.Proj("+init=EPSG:4326")
NewJersey = pyproj.Proj("+init=EPSG:3424")

point = [ 621214, 547761 ]   
count = 1000000.    # 100. for 2.2.2 or 2.4.0
start = time.time()
for i in repeat(None, int(count) ):
    tpoint = pyproj.transform( NewJersey, wgs84,  point[0] * .3048, point[1] * .3048)

runtime = time.time() - start

print( "pyproj version:", pyproj.__version__ )
print( "python version:", sys.version )
print( "count:", count )
print( "time:", runtime )
print( "per iteration:", runtime/count )

Problem description

With release 1.9.5.1 the above programs takes 5.457669973373413e-06 sec/iteration
With release 2.2.2 it takes 0.060466268062591554 sec/iteration, ~11,000 times slower.

Why such a huge decrease in performance?
Thanks,
Bill

Results shown are for python2.7 I got similar results with pyproj 2.4.0 on python3.7.

Expected Output

('pyproj version:', '2.2.2')
('python version:', '2.7.17 (default, Oct 22 2019, 09:14:09) \n[GCC 9.2.0]')
('count:', 100.0)
('time:', 6.046626806259155)
('per iteration:', 0.060466268062591554)
---------------------------------------------------------------
('pyproj version:', '1.9.5.1')
('python version:', '2.7.17 (default, Oct 22 2019, 09:14:09) \n[GCC 9.2.0]')
('count:', 1000000.0)
('time:', 5.457669973373413)
('per iteration:', 5.457669973373413e-06)

Environment Information

Shown above and...
Linux-5.3.8-arch1-1-x86_64-with-arch

Installation method

pip2 for python2.7
pacman -S for python3.7

[snowman2]

The good news is that we have already encountered this and there is a solution:
https://pyproj4.github.io/pyproj/stable/advanced_examples.html#optimize-transformations

[wrwetzel]

Great, thanks very much. The suggest approach works fine... but why?

What ever changed to make the original approach so slow?

[snowman2]

What ever changed to make the original approach so slow?

These links might help gain some insight:

• transform much slower in 2.0.1 than 1.9.6 #187 (comment)
• https://gdalbarn.com/