Siying Dong 33042669f6 Reduce malloc of iterators in Get() code paths ...

Summary:
This patch optimized Get() code paths by avoiding malloc of iterators. Iterator creation is moved to mem table rep implementations, where a callback is called when any key is found. This is the same practice as what we do in (SST) table readers.

db_bench result for readrandom following a writeseq, with no compression, single thread and tmpfs, we see throughput improved to 144958 from 139027, about 3%.

Test Plan: make all check

Reviewers: dhruba, haobo, igor

Reviewed By: haobo

CC: leveldb, yhchiang

Differential Revision: https://reviews.facebook.net/D14685

2014-02-11 10:32:51 -08:00

..

c.h

Support for LZ4 compression.

2014-02-08 14:15:51 -08:00

cache.h

Merge branch 'master' into performance

2014-01-28 10:35:55 -08:00

compaction_filter.h

Clarify CompactionFilter thread safety requirements

2013-12-02 16:41:43 -08:00

comparator.h

Add License message to public header files.

2013-11-18 10:21:35 -08:00

db.h

Reduce malloc of iterators in Get() code paths

2014-02-11 10:32:51 -08:00

env.h

Fix some 32-bit compile errors

2014-02-03 13:48:30 -08:00

filter_policy.h

Add License message to public header files.

2013-11-18 10:21:35 -08:00

flush_block_policy.h

Add License message to public header files.

2013-11-18 10:21:35 -08:00

iterator.h

Add License message to public header files.

2013-11-18 10:21:35 -08:00

ldb_tool.h

Add License message to public header files.

2013-11-18 10:21:35 -08:00

memtablerep.h

Reduce malloc of iterators in Get() code paths

2014-02-11 10:32:51 -08:00

merge_operator.h

Introduce MergeContext to Lazily Initialize merge operand list

2013-12-11 11:37:28 -08:00

options.h

Support for LZ4 compression.

2014-02-08 14:15:51 -08:00

perf_context.h

Revert "Allow users to profile a query and see bottleneck of the query"

2013-11-21 17:40:39 -08:00

slice_transform.h

Add License message to public header files.

2013-11-18 10:21:35 -08:00

slice.h

Add License message to public header files.

2013-11-18 10:21:35 -08:00

statistics.h

Merge branch 'master' into performance

2014-01-23 16:32:49 -08:00

status.h

Avoid malloc in NotFound key status if no message is given.

2013-12-26 16:23:10 -08:00

table_properties.h

First phase API clean up

2014-02-03 00:30:43 -08:00

table.h

Put table factory back to public api

2014-02-03 19:51:20 -08:00

transaction_log.h

Initialize sequence number in BatchResult - issue #39

2013-12-20 10:01:12 -08:00

types.h

Add License message to public header files.

2013-11-18 10:21:35 -08:00

universal_compaction.h

Moving Some includes from options.h to forward declaration

2014-01-24 17:16:22 -08:00

write_batch.h

Fix the return type of WriteBatch::Data().

2014-01-14 20:24:48 -08:00