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opt: reduce allocations in Implicator and JoinOrderBuilder #54159
Merged
craig
merged 2 commits into
cockroachdb:master
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mgartner:lazy-init-constraint-cache
Sep 10, 2020
Merged
opt: reduce allocations in Implicator and JoinOrderBuilder #54159
craig
merged 2 commits into
cockroachdb:master
from
mgartner:lazy-init-constraint-cache
Sep 10, 2020
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This commit makes the constructing of the Implicator's constrain cache map lazy. Instead of making the map in the `Init` method, it is made only when it is needed. This fixes performance regressions in microbenchmarks. name old time/op new time/op delta Phases/kv-read-const/Normalize-16 170ns ± 0% 139ns ± 0% -18.66% (p=0.008 n=5+5) Phases/kv-read-const/OptBuild-16 173ns ± 1% 141ns ± 1% -18.38% (p=0.008 n=5+5) Phases/kv-read-const/Explore-16 183ns ± 1% 151ns ± 0% -17.70% (p=0.008 n=5+5) Phases/kv-read-const/ExecBuild-16 674ns ± 2% 636ns ± 1% -5.58% (p=0.008 n=5+5) Phases/kv-read/ExecBuild-16 13.3µs ± 1% 13.1µs ± 1% -1.78% (p=0.008 n=5+5) Phases/tpcc-delivery/ExecBuild-16 29.4µs ± 1% 28.9µs ± 0% -1.64% (p=0.016 n=5+4) Phases/tpcc-stock-level/Explore-16 153µs ± 1% 151µs ± 1% -1.24% (p=0.008 n=5+5) Phases/kv-read-no-prep/Explore-16 42.3µs ± 1% 41.9µs ± 0% -0.85% (p=0.008 n=5+5) Phases/tpcc-delivery/OptBuild-16 12.1µs ± 1% 12.1µs ± 0% -0.65% (p=0.032 n=5+5) Phases/kv-read/Parse-16 2.49ns ± 1% 2.48ns ± 0% ~ (p=0.413 n=5+4) Phases/kv-read/OptBuild-16 6.46µs ± 2% 6.44µs ± 1% ~ (p=0.841 n=5+5) Phases/kv-read/Normalize-16 6.48µs ± 3% 6.48µs ± 2% ~ (p=1.000 n=5+5) Phases/kv-read/Explore-16 12.1µs ± 1% 11.9µs ± 2% ~ (p=0.056 n=5+5) Phases/kv-read-no-prep/OptBuild-16 32.4µs ± 3% 32.2µs ± 1% ~ (p=1.000 n=5+5) Phases/kv-read-no-prep/Normalize-16 34.9µs ± 1% 34.7µs ± 2% ~ (p=0.222 n=5+5) Phases/kv-read-no-prep/ExecBuild-16 44.0µs ± 3% 43.7µs ± 1% ~ (p=0.310 n=5+5) Phases/kv-read-const/Parse-16 2.60ns ± 1% 2.60ns ± 1% ~ (p=0.643 n=5+5) Phases/tpcc-new-order/Normalize-16 12.8µs ± 1% 13.9µs ±10% ~ (p=0.690 n=5+5) Phases/tpcc-new-order/ExecBuild-16 38.5µs ± 1% 38.6µs ± 2% ~ (p=1.000 n=5+5) Phases/tpcc-delivery/Parse-16 2.55ns ± 1% 2.56ns ± 1% ~ (p=0.921 n=5+5) Phases/tpcc-delivery/Normalize-16 12.6µs ± 2% 12.5µs ± 1% ~ (p=0.151 n=5+5) Phases/tpcc-delivery/Explore-16 28.0µs ± 2% 27.6µs ± 1% ~ (p=0.063 n=5+5) Phases/tpcc-stock-level/OptBuild-16 52.8µs ± 1% 52.9µs ± 1% ~ (p=1.000 n=5+5) Phases/tpcc-stock-level/Normalize-16 53.7µs ± 1% 53.7µs ± 1% ~ (p=1.000 n=5+5) Phases/tpcc-stock-level/ExecBuild-16 160µs ± 1% 161µs ± 1% ~ (p=0.222 n=5+5) Phases/tpcc-new-order/Explore-16 36.2µs ± 0% 36.7µs ± 1% +1.47% (p=0.016 n=4+5) Phases/kv-read-no-prep/Parse-16 12.6µs ± 1% 12.8µs ± 1% +1.58% (p=0.016 n=4+5) Phases/tpcc-new-order/Parse-16 2.58ns ± 1% 2.67ns ± 7% +3.33% (p=0.048 n=5+5) Phases/tpcc-stock-level/Parse-16 2.52ns ± 1% 2.63ns ± 4% +4.29% (p=0.016 n=5+5) Phases/tpcc-new-order/OptBuild-16 13.0µs ± 1% 14.7µs ± 2% +12.50% (p=0.008 n=5+5) Release note: None
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Can you also make the other fix I mentioned in another commit? (making |
This commit embeds the JoinOrderBuilder in the Optimizer struct. This avoids allocating a new JoinOrderBuilder on the heap every time `Optimizer.Init` is called. BenchmarkPhase microbenchmarks comparing the current master branch to this commit: name old time/op new time/op delta Phases/kv-read-const/Normalize-16 171ns ± 1% 77ns ± 1% -55.11% (p=0.008 n=5+5) Phases/kv-read-const/OptBuild-16 175ns ± 1% 79ns ± 2% -54.83% (p=0.008 n=5+5) Phases/kv-read-const/Explore-16 189ns ± 7% 89ns ± 0% -53.14% (p=0.008 n=5+5) Phases/tpcc-new-order/OptBuild-16 16.6µs ± 6% 12.7µs ± 2% -23.47% (p=0.008 n=5+5) Phases/tpcc-new-order/Normalize-16 14.7µs ± 8% 12.4µs ± 1% -15.39% (p=0.008 n=5+5) Phases/kv-read-const/ExecBuild-16 687ns ± 4% 592ns ± 1% -13.89% (p=0.008 n=5+5) Phases/tpcc-new-order/Parse-16 2.94ns ± 8% 2.58ns ± 2% -12.23% (p=0.008 n=5+5) Phases/tpcc-delivery/Parse-16 2.86ns ± 8% 2.54ns ± 1% -11.33% (p=0.008 n=5+5) Phases/tpcc-new-order/ExecBuild-16 43.0µs ±10% 38.6µs ± 0% -10.21% (p=0.016 n=5+4) Phases/tpcc-new-order/Explore-16 39.0µs ± 3% 36.6µs ± 0% -6.12% (p=0.008 n=5+5) Phases/tpcc-delivery/OptBuild-16 12.4µs ± 1% 12.0µs ± 0% -3.49% (p=0.008 n=5+5) Phases/kv-read/ExecBuild-16 13.4µs ± 0% 12.9µs ± 0% -3.37% (p=0.008 n=5+5) Phases/kv-read/Explore-16 12.1µs ± 1% 11.7µs ± 2% -3.04% (p=0.008 n=5+5) Phases/tpcc-delivery/Normalize-16 12.8µs ± 1% 12.4µs ± 1% -3.00% (p=0.008 n=5+5) Phases/kv-read-no-prep/ExecBuild-16 44.1µs ± 2% 43.2µs ± 1% -2.16% (p=0.008 n=5+5) Phases/kv-read/Normalize-16 6.48µs ± 1% 6.36µs ± 1% -1.73% (p=0.008 n=5+5) Phases/kv-read-no-prep/Explore-16 42.6µs ± 1% 41.9µs ± 1% -1.55% (p=0.032 n=5+5) Phases/tpcc-delivery/ExecBuild-16 29.5µs ± 1% 29.1µs ± 0% -1.41% (p=0.008 n=5+5) Phases/kv-read-no-prep/OptBuild-16 32.2µs ± 0% 31.7µs ± 1% -1.34% (p=0.008 n=5+5) Phases/kv-read-no-prep/Normalize-16 34.8µs ± 1% 34.4µs ± 1% -1.25% (p=0.016 n=5+4) Phases/tpcc-stock-level/OptBuild-16 53.1µs ± 0% 52.7µs ± 0% -0.83% (p=0.016 n=5+5) Phases/kv-read/Parse-16 2.49ns ± 0% 2.49ns ± 1% ~ (p=0.952 n=4+5) Phases/kv-read/OptBuild-16 6.48µs ± 0% 6.44µs ± 1% ~ (p=0.310 n=5+5) Phases/kv-read-no-prep/Parse-16 12.7µs ± 2% 12.7µs ± 1% ~ (p=0.508 n=5+5) Phases/kv-read-const/Parse-16 2.59ns ± 1% 2.59ns ± 1% ~ (p=0.857 n=5+5) Phases/tpcc-delivery/Explore-16 27.9µs ± 0% 27.9µs ± 2% ~ (p=0.310 n=5+5) Phases/tpcc-stock-level/Parse-16 2.57ns ± 2% 2.54ns ± 3% ~ (p=0.254 n=5+5) Phases/tpcc-stock-level/Normalize-16 53.8µs ± 0% 53.5µs ± 2% ~ (p=0.151 n=5+5) Phases/tpcc-stock-level/Explore-16 153µs ± 0% 152µs ± 3% ~ (p=0.151 n=5+5) Phases/tpcc-stock-level/ExecBuild-16 162µs ± 1% 161µs ± 1% ~ (p=0.095 n=5+5) Release note: None
Thank you sir, LGTM! |
mgartner
changed the title
partialidx: lazily initialize the implicator constraint cache
opt: reduce allocations in Implicator and JoinOrderBuilder
Sep 10, 2020
bors r=RaduBerinde |
Build succeeded: |
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partialidx: lazily initialize the implicator constraint cache
This commit makes the constructing of the Implicator's constrain cache
map lazy. Instead of making the map in the
Init
method, it is madeonly when it is needed.
This fixes performance regressions in microbenchmarks.
Release note: None
opt: embed JoinOrderBuilder in Optimizer
This commit embeds the JoinOrderBuilder in the Optimizer struct. This
avoids allocating a new JoinOrderBuilder on the heap every time
Optimizer.Init
is called.BenchmarkPhase microbenchmarks comparing the current master branch to
this commit:
Release note: None