Every incoming Binder call ends up triggering a BlockGuardPolicy
update, which would thrash between new AndroidBlockGuardPolicy
instances and BlockGuard.LAX_POLICY, causing GC churn.
This change avoids the extra allocations by recycling a single
AndroidBlockGuardPolicy in a ThreadLocal. Worst-case thrashing case
is now 10% faster; from 7.46us to 6.65us.
Bug: 9424568
Change-Id: I9c3b1c097a2aecc9b1f109a824cf3ea319fb3393
Current timings on a mako listed below, which show minimal overhead
compared to writing directly. The increased code readability and
automatic indenting is worth the overhead.
Also worth noting is that writing concatenated strings is
substantially faster than printing components separately.
benchmark us linear runtime
ComplexDirect 10712.7 =========================
ComplexIndenting 12623.7 ==============================
PairIndenting 45.8 =
PairRaw 82.1 =
SimpleDirect 282.2 =
SimpleIndenting 294.4 =
Change-Id: I7c38690c14b017fa46248ebb0be69f6beff03371
Switch to parsing detailed network stats with native code, which
is 71% faster than ProcFileReader.
Change-Id: I2525aaee74d227ce187ba3a74dd08a2b06514deb
Deprecate transport layer statistics, leaving only the summarized
network layer statistics.
Improve documentation to be clear about layers where measurements
occur, and their behavior since boot. Under the hood, move to using
xt_qtaguid UID statistics.
Bug: 6818637, 7013662
Change-Id: I9f26992e5fcdebd88c671e5765bd91229e7b0016
