#170 test buffer seek

#184 #170 flush at threshold test

#184 #170 first basic flush test

#184 untested implementation of the flush feature

optimization for buffer write easy cases

#170 no bug never existed

#170 complete write tests for status quo

fix regression: nitems adjusted at the wrong location

(0) -300 -100 -30 -10 -8 +8 +10 +30 +100 +300 tip

mercurial