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Peter Dillinger e92a0ed040 Optimize & clean up footer code (#9280) 
Summary:
Again, ahead of planned changes in https://github.com/facebook/rocksdb/issues/9058. This change improves
performance (vs. pre-https://github.com/facebook/rocksdb/issues/9240 baseline) by separating a FooterBuilder from
Footer, where FooterBuilder includes (inline owns) the serialized data
so that it can be stack allocated.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9280

Test Plan:
existing tests + performance testing below

Extreme case performance testing as in https://github.com/facebook/rocksdb/issues/9240 with

    TEST_TMPDIR=/dev/shm/ ./db_bench -benchmarks=fillseq -memtablerep=vector -allow_concurrent_memtable_write=false -num=30000000

(Each is ops/s averaged over 50 runs, run simultaneously with competing
configuration for load fairness)
Pre-https://github.com/facebook/rocksdb/issues/9240 baseline (f577458): 436389
With https://github.com/facebook/rocksdb/issues/9240 (653c392): 417946 (-4.2% vs. baseline)
This change: 443762 (+1.7% vs. baseline)

Reviewed By: ajkr

Differential Revision: D33077220

Pulled By: pdillinger

fbshipit-source-id: 7eaa6499589aac1693414a758e8c799216c5016c
2021-12-13 17:43:07 -08:00
..
plain_table_bloom.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
plain_table_bloom.h Remove some unneeded code (#8736) 2021-09-01 14:28:58 -07:00
plain_table_builder.cc Optimize & clean up footer code (#9280) 2021-12-13 17:43:07 -08:00
plain_table_builder.h Support "level_at_creation" in TablePropertiesCollectorFactory::Context (#8919) 2021-09-28 12:35:24 -07:00
plain_table_factory.cc Support "level_at_creation" in TablePropertiesCollectorFactory::Context (#8919) 2021-09-28 12:35:24 -07:00
plain_table_factory.h Refactor: use TableBuilderOptions to reduce parameter lists (#8240) 2021-04-29 07:00:50 -07:00
plain_table_index.cc Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
plain_table_index.h Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
plain_table_key_coding.cc In ParseInternalKey(), include corrupt key info in Status (#7515) 2020-10-28 10:12:58 -07:00
plain_table_key_coding.h Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
plain_table_reader.cc Improve / clean up meta block code & integrity (#9163) 2021-11-18 11:43:44 -08:00
plain_table_reader.h Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00