Consolidate benchmark code to benchmarks/.

Currently, the benchmark used to assess leveldb changes lives in db/. The codebase also contains two benchmarks against other database engines in doc/bench/. Moving all the benchmarks in one place opens up the way for extracting common code.

PiperOrigin-RevId: 246737541

.clang-format

@@ -8,7 +8,7 @@ DerivePointerAlignment: false
 # Order them so that when imported to the authoritative repository they will be
 # in correct alphabetical order.
 IncludeCategories:
-  - Regex:           '^(<|"(db|helpers)/)'
+  - Regex:           '^(<|"(benchmarks|db|helpers)/)'
     Priority:        1
   - Regex:           '^"(leveldb)/'
     Priority:        2

CMakeLists.txt

@@ -374,12 +374,12 @@ if(LEVELDB_BUILD_BENCHMARKS)
   endfunction(leveldb_benchmark)
 
   if(NOT BUILD_SHARED_LIBS)
-    leveldb_benchmark("${PROJECT_SOURCE_DIR}/db/db_bench.cc")
+    leveldb_benchmark("${PROJECT_SOURCE_DIR}/benchmarks/db_bench.cc")
   endif(NOT BUILD_SHARED_LIBS)
 
   check_library_exists(sqlite3 sqlite3_open "" HAVE_SQLITE3)
   if(HAVE_SQLITE3)
-    leveldb_benchmark("${PROJECT_SOURCE_DIR}/doc/bench/db_bench_sqlite3.cc")
+    leveldb_benchmark("${PROJECT_SOURCE_DIR}/benchmarks/db_bench_sqlite3.cc")
     target_link_libraries(db_bench_sqlite3 sqlite3)
   endif(HAVE_SQLITE3)
 
@@ -399,7 +399,7 @@ int main() {
   "  HAVE_KYOTOCABINET)
   set(CMAKE_REQUIRED_LIBRARIES ${OLD_CMAKE_REQURED_LIBRARIES})
   if(HAVE_KYOTOCABINET)
-    leveldb_benchmark("${PROJECT_SOURCE_DIR}/doc/bench/db_bench_tree_db.cc")
+    leveldb_benchmark("${PROJECT_SOURCE_DIR}/benchmarks/db_bench_tree_db.cc")
     target_link_libraries(db_bench_tree_db kyotocabinet)
   endif(HAVE_KYOTOCABINET)
 endif(LEVELDB_BUILD_BENCHMARKS)

doc/benchmark.html

@@ -90,9 +90,9 @@ div.bsql {
 <h4>Benchmark Source Code</h4>
 <p>We wrote benchmark tools for SQLite and Kyoto TreeDB based on LevelDB's <span class="code">db_bench</span>. The code for each of the benchmarks resides here:</p>
 <ul>
-	<li> <b>LevelDB:</b> <a href="http://code.google.com/p/leveldb/source/browse/trunk/db/db_bench.cc">db/db_bench.cc</a>.</li>
-	<li> <b>SQLite:</b> <a href="http://code.google.com/p/leveldb/source/browse/#svn%2Ftrunk%2Fdoc%2Fbench%2Fdb_bench_sqlite3.cc">doc/bench/db_bench_sqlite3.cc</a>.</li>
-	<li> <b>Kyoto TreeDB:</b> <a href="http://code.google.com/p/leveldb/source/browse/#svn%2Ftrunk%2Fdoc%2Fbench%2Fdb_bench_tree_db.cc">doc/bench/db_bench_tree_db.cc</a>.</li>
+	<li> <b>LevelDB:</b> <a href="https://github.com/google/leveldb/blob/master/benchmarks/db_bench.cc">benchmarks/db_bench.cc</a>.</li>
+	<li> <b>SQLite:</b> <a href="https://github.com/google/leveldb/blob/master/benchmarks/db_bench_sqlite3.cc">benchmarks/db_bench_sqlite3.cc</a>.</li>
+	<li> <b>Kyoto TreeDB:</b> <a href="https://github.com/google/leveldb/blob/master/benchmarks/db_bench_tree_db.cc">benchmarks/db_bench_tree_db.cc</a>.</li>
 </ul>
 
 <h4>Custom Build Specifications</h4>