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Siying Dong edcbb36944 Three code-level optimization to Iterator::Next() 
Summary:
Three small optimizations:
(1) iter_->IsKeyPinned() shouldn't be called if read_options.pin_data is not true. This may trigger function call all the way down the iterator tree.
(2) reuse the iterator key object in DBIter::FindNextUserEntryInternal(). The constructor of the class has some overheads.
(3) Move the switching direction logic in MergingIterator::Next() to a separate function.

These three in total improves readseq performance by about 3% in my benchmark setting.
Closes https://github.com/facebook/rocksdb/pull/2880

Differential Revision: D5829252

Pulled By: siying

fbshipit-source-id: 991aea10c6d6c3b43769cb4db168db62954ad1e3
2017-09-14 17:57:31 -07:00
..
builder.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
builder.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
c_test.c
Added save points for transactions C API
2017-09-14 14:18:59 -07:00
c.cc
Added save points for transactions C API
2017-09-14 14:18:59 -07:00
column_family_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
column_family.cc
rename stall-related internal stats
2017-09-07 18:26:18 -07:00
column_family.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
compact_files_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
compacted_db_impl.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
compacted_db_impl.h
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
compaction_iteration_stats.h
add counter for deletion dropping optimization
2017-08-19 14:10:08 -07:00
compaction_iterator_test.cc
Allow merge operator to be called even with a single operand
2017-08-16 23:42:00 -07:00
compaction_iterator.cc
add counter for deletion dropping optimization
2017-08-19 14:10:08 -07:00
compaction_iterator.h
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
compaction_job_stats_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
compaction_job_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
compaction_job.cc
Fix CLANG Analyze
2017-09-07 14:28:06 -07:00
compaction_job.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
compaction_picker_test.cc
Fix FIFO compaction picker test
2017-07-26 12:12:26 -07:00
compaction_picker_universal.cc
update scores after picking universal compaction
2017-08-16 18:42:33 -07:00
compaction_picker_universal.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
compaction_picker.cc
fix hanging after CompactFiles with L0 overlap
2017-09-13 15:41:38 -07:00
compaction_picker.h
fix hanging after CompactFiles with L0 overlap
2017-09-13 15:41:38 -07:00
compaction.cc
Fix false removal of tombstone issue in FIFO and kCompactionStyleNone
2017-08-15 13:02:19 -07:00
compaction.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
comparator_db_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
convenience.cc
add VerifyChecksum() to db.h
2017-08-09 15:58:13 -07:00
corruption_test.cc
fix corruption_test valgrind
2017-08-11 12:29:14 -07:00
cuckoo_table_db_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_basic_test.cc
support disabling checksum in block-based table
2017-08-23 19:40:47 -07:00
db_block_cache_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_bloom_filter_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_compaction_filter_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_compaction_test.cc
fix hanging after CompactFiles with L0 overlap
2017-09-13 15:41:38 -07:00
db_dynamic_level_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_encryption_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_filesnapshot.cc
Remove some left-over BSD headers
2017-07-18 11:56:57 -07:00
db_flush_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_impl_compaction_flush.cc
fix hanging after CompactFiles with L0 overlap
2017-09-13 15:41:38 -07:00
db_impl_debug.cc
Introduce bottom-pri thread pool for large universal compactions
2017-08-03 15:43:29 -07:00
db_impl_experimental.cc
Fix naming in InternalKey
2017-09-12 17:17:42 -07:00
db_impl_files.cc
Fix CLANG Analyze
2017-09-07 14:28:06 -07:00
db_impl_open.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_impl_readonly.cc
Add Iterator::Refresh()
2017-07-24 10:54:37 -07:00
db_impl_readonly.h
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_impl_write.cc
Fix missing BYTES_PER_WRITE for pipeline write
2017-09-11 11:41:27 -07:00
db_impl.cc
Fix naming in InternalKey
2017-09-12 17:17:42 -07:00
db_impl.h
write-prepared txn: call IsInSnapshot
2017-09-11 09:14:48 -07:00
db_info_dumper.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_info_dumper.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_inplace_update_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_io_failure_test.cc
Fix LITE unit tests
2017-07-26 21:11:47 -07:00
db_iter_test.cc
Add Iterator::Refresh()
2017-07-24 10:54:37 -07:00
db_iter.cc
Three code-level optimization to Iterator::Next()
2017-09-14 17:57:31 -07:00
db_iter.h
Add Iterator::Refresh()
2017-07-24 10:54:37 -07:00
db_iterator_test.cc
perf_context measure user bytes read
2017-08-18 11:43:33 -07:00
db_log_iter_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_memtable_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_merge_operator_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_options_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_properties_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_range_del_test.cc
Fix wrong smallest key of delete range tombstones
2017-08-29 18:41:35 -07:00
db_sst_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_statistics_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_table_properties_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_tailing_iter_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_test2.cc
write-prepared txn: call IsInSnapshot
2017-09-11 09:14:48 -07:00
db_test_util.cc
Updated CRC32 Power Optimization Changes
2017-08-31 14:16:30 -07:00
db_test_util.h
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
db_test.cc
speedup DBTest.EncodeDecompressedBlockSizeTest
2017-09-12 11:26:47 -07:00
db_universal_compaction_test.cc
update scores after picking universal compaction
2017-08-16 18:42:33 -07:00
db_wal_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_write_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
dbformat_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
dbformat.cc
Two small refactoring for better inlining
2017-09-14 15:41:49 -07:00
dbformat.h
Two small refactoring for better inlining
2017-09-14 15:41:49 -07:00
deletefile_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
event_helpers.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
event_helpers.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
experimental.cc
Replace dynamic_cast<>
2017-07-28 16:27:16 -07:00
external_sst_file_basic_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
external_sst_file_ingestion_job.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
external_sst_file_ingestion_job.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
external_sst_file_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
fault_injection_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
file_indexer_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
file_indexer.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
file_indexer.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
filename_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
flush_job_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
flush_job.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
flush_job.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
flush_scheduler.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
flush_scheduler.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
forward_iterator_bench.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
forward_iterator.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
forward_iterator.h
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
internal_stats.cc
rename stall-related internal stats
2017-09-07 18:26:18 -07:00
internal_stats.h
rename stall-related internal stats
2017-09-07 18:26:18 -07:00
job_context.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
listener_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
log_format.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
log_reader.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
log_reader.h
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2017-07-15 16:11:23 -07:00
log_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
log_writer.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
log_writer.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
malloc_stats.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
malloc_stats.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
managed_iterator.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
managed_iterator.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
manual_compaction_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
memtable_list_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
memtable_list.cc
write-prepared txn: call IsInSnapshot
2017-09-11 09:14:48 -07:00
memtable_list.h
write-prepared txn: call IsInSnapshot
2017-09-11 09:14:48 -07:00
memtable.cc
do not call merge when checking to see if key exists
2017-09-12 12:02:53 -07:00
memtable.h
write-prepared txn: call IsInSnapshot
2017-09-11 09:14:48 -07:00
merge_context.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
merge_helper_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
merge_helper.cc
Allow merge operator to be called even with a single operand
2017-08-16 23:42:00 -07:00
merge_helper.h
Allow merge operator to be called even with a single operand
2017-08-16 23:42:00 -07:00
merge_operator.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
merge_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
options_file_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
perf_context_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
pinned_iterators_manager.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
plain_table_db_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
prefix_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
range_del_aggregator_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
range_del_aggregator.cc
Two small refactoring for better inlining
2017-09-14 15:41:49 -07:00
range_del_aggregator.h
Two small refactoring for better inlining
2017-09-14 15:41:49 -07:00
read_callback.h
write-prepared txn: call IsInSnapshot
2017-09-11 09:14:48 -07:00
repair_test.cc
Try to repair db with wal_dir option, avoid leak some WAL files
2017-08-08 10:47:57 -07:00
repair.cc
Try to repair db with wal_dir option, avoid leak some WAL files
2017-08-08 10:47:57 -07:00
snapshot_impl.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
snapshot_impl.h
WriteAtPrepare: Efficient read from snapshot list
2017-08-26 01:00:38 -07:00
table_cache.cc
fix db get/write stats
2017-07-31 12:12:03 -07:00
table_cache.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
table_properties_collector_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
table_properties_collector.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
table_properties_collector.h
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
transaction_log_impl.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
transaction_log_impl.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
version_builder_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
version_builder.cc
Allow DB reopen with reduced options.num_levels
2017-08-24 16:10:54 -07:00
version_builder.h
Allow DB reopen with reduced options.num_levels
2017-08-24 16:10:54 -07:00
version_edit_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
version_edit.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
version_edit.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
version_set_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
version_set.cc
Fix naming in InternalKey
2017-09-12 17:17:42 -07:00
version_set.h
write-prepared txn: call IsInSnapshot
2017-09-11 09:14:48 -07:00
wal_manager_test.cc
Revert "comment out unused parameters"
2017-07-21 18:26:26 -07:00
wal_manager.cc
Replace dynamic_cast<>
2017-07-28 16:27:16 -07:00
wal_manager.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_batch_base.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_batch_internal.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_batch_test.cc
Gcc 7 ParsedInternalKey replace memset with clear function.
2017-07-24 11:31:15 -07:00
write_batch.cc
Update WritePrepared with the pseudo code
2017-08-16 16:57:47 -07:00
write_callback_test.cc
Exclude incompatible options in test
2017-09-12 14:58:46 -07:00
write_callback.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_controller_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_controller.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_controller.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_thread.cc
Fix the overflow bug in AwaitState
2017-08-03 10:43:28 -07:00
write_thread.h
fix comment
2017-08-09 22:57:01 -07:00