Dan Colish wrote:
CREATE TABLE
INSERT 0 100000
Timing is on.
COPY 100000
Time: 83.273 ms
BEGIN
Time: 0.412 ms
TRUNCATE TABLE
Time: 0.357 ms
COPY 100000
Time: 140.911 ms
COMMIT
Time: 4.909 ms
Anything that doesn't have times that are orders of magnitude greater
than this is pretty much useless as a measurement of COPY performance,
IMNSHO.
In this particular test, to check for paring times, I'd be inclined to
do copy repeatedly (i.e. probably quite a few thousand times) from an
empty file to test the speed. Something like:
select current_timestamp;
begin;
truncate;
copy;copy;copy; ...
commit;
select current_timestamp;
(tests like this are really a good case for DO ' something'; - we could
put a loop in the DO.)
cheers
andrew
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