Export of internal Abseil changes

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daf5a2b9ab3507ad5fb9aebe9165933f33098b83 by Abseil Team <absl-team@google.com>:

Absl flat containers reserve enough space even in the presence of tombstones.

PiperOrigin-RevId: 372339945

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9a61504867ba0eccc5046d7333090fbe3439cdd9 by Abseil Team <absl-team@google.com>:

Add benchmark for BlockingCounter

PiperOrigin-RevId: 372246068

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91ee87e6de09fc62970667ee52654c9dcf7c478d by Evan Brown <ezb@google.com>:

In absl::StrSplit, support btree_multimap, and other non-std::multimap-multimaps by supporting any map type that returns iterator from insert().

Also:
- Use emplace() instead of insert() when available, not just for std::(multi)map - we can potentially change some string copies to moves this way.
- We no longer need the Insert class so remove it.
PiperOrigin-RevId: 372209653
GitOrigin-RevId: daf5a2b9ab3507ad5fb9aebe9165933f33098b83
Change-Id: I83098fde4a722cd4b682f024d3bfa56c613f960c

1 files changed, 15 insertions, 0 deletions

diff --git a/absl/synchronization/BUILD.bazel b/absl/synchronization/BUILD.bazel
index 5ce16958..92e2448d 100644
--- a/absl/synchronization/BUILD.bazel
+++ b/absl/synchronization/BUILD.bazel
@@ -136,6 +136,21 @@ cc_test(
     ],
 )
 
+cc_binary(
+    name = "blocking_counter_benchmark",
+    testonly = 1,
+    srcs = ["blocking_counter_benchmark.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = ["benchmark"],
+    visibility = ["//visibility:private"],
+    deps = [
+        ":synchronization",
+        ":thread_pool",
+        "@com_github_google_benchmark//:benchmark_main",
+    ],
+)
+
 cc_test(
     name = "graphcycles_test",
     size = "medium",