[#BENCHMARK_COUNTERS]
= BENCHMARK_COUNTERS
:mrdocs:

Allow users to record customized counter during benchmarking, there will be one extra column showing in the output result for each counter

== Synopsis

Declared in `<folly/Benchmark.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
#define BENCHMARK_COUNTERS(name, counters, ...)

----

== Description

BENCHMARK_COUNTERS(insertVectorBegin, counters, iters) { vector<int> v; for (unsigned int i = 0; i < iters; ++i) { v.insert(v.begin(), 42); } BENCHMARK_SUSPEND { counters["foo"]= 10; } }

== Parameters

[cols="1,4"]
|===
| Name| Description
| *name*
| The benchmark's name, also used as its function identifier.
| *counters*
| The UserCounters parameter recorded during the benchmark.
|===


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