tree 666cf59576078f7bb3e41411f22b71b0f0e6a5c7
parent 1d510e2261d65beccf47d8ddcfc315c06cec7996
author Todd Wang <toddw@google.com> 1457379232 -0800
committer Todd Wang <toddw@google.com> 1457379232 -0800

sensorlog: Remove generated IsZero logic.

The purpose of the IsZero logic was as a speed-up; the normal vom
zero-field encoding is slow, since it actually encodes fields and
then backtracks to throw away zero-valued fields.  However the
generated IsZero was actually significantly *slower*, for the
native types case, and possibly also the non-native types case.

In the future we will re-enable the IsZero logic for simple
cases (no native types, no typeobject or union).  And we may
enable IsZero for the more complicated cases, if we can come up
with a simple strategy that is actually faster that the default
backtracking implementation.

MultiPart: 6/6

Change-Id: Ic505113ba121db876a60318ab3270e8058a047f6