Fix typos found by codespell (#1519)

CMakeLists.txt

@@ -236,7 +236,7 @@ else()
 
   # On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a
   # predefined macro, which turns on all of the wonderful libc extensions.
-  # However g++ doesn't do this in Cygwin so we have to define it ourselfs
+  # However g++ doesn't do this in Cygwin so we have to define it ourselves
   # since we depend on GNU/POSIX/BSD extensions.
   if (CYGWIN)
     add_definitions(-D_GNU_SOURCE=1)

bindings/python/google_benchmark/__init__.py

@@ -104,7 +104,7 @@ class __OptionMaker:
                 options = self.make(func_or_options)
                 options.builder_calls.append((builder_name, args, kwargs))
                 # The decorator returns Options so it is not technically a decorator
-                # and needs a final call to @regiser
+                # and needs a final call to @register
                 return options
 
             return __decorator

bindings/python/google_benchmark/example.py

@@ -72,7 +72,7 @@ def manual_timing(state):
 
 @benchmark.register
 def custom_counters(state):
-    """Collect cutom metric using benchmark.Counter."""
+    """Collect custom metric using benchmark.Counter."""
     num_foo = 0.0
     while state:
         # Benchmark some code here

docs/perf_counters.md

@@ -19,7 +19,7 @@ The feature does not require modifying benchmark code. Counter collection is
 handled at the boundaries where timer collection is also handled. 
 
 To opt-in:
-* If using a Bazel build, add `--define pfm=1` to your buid flags
+* If using a Bazel build, add `--define pfm=1` to your build flags
 * If using CMake:
   * Install `libpfm4-dev`, e.g. `apt-get install libpfm4-dev`.
   * Enable the CMake flag `BENCHMARK_ENABLE_LIBPFM` in `CMakeLists.txt`.

docs/reducing_variance.md

@@ -70,7 +70,7 @@ reason some companies maintain machines dedicated to performance testing.
 Some of the easier and and effective ways of reducing variance on a typical
 Linux workstation are:
 
-1. Use the performance governer as [discussed
+1. Use the performance governor as [discussed
 above](user_guide#disabling-cpu-frequency-scaling).
 1. Disable processor boosting by:
    ```sh

include/benchmark/benchmark.h

@@ -1845,7 +1845,7 @@ inline double GetTimeUnitMultiplier(TimeUnit unit) {
 
 // Creates a list of integer values for the given range and multiplier.
 // This can be used together with ArgsProduct() to allow multiple ranges
-// with different multiplers.
+// with different multipliers.
 // Example:
 // ArgsProduct({
 //   CreateRange(0, 1024, /*multi=*/32),

src/benchmark.cc

@@ -73,8 +73,8 @@ BM_DEFINE_string(benchmark_filter, "");
 BM_DEFINE_double(benchmark_min_time, 0.5);
 
 // Minimum number of seconds a benchmark should be run before results should be
-// taken into account. This e.g can be neccessary for benchmarks of code which
+// taken into account. This e.g can be necessary for benchmarks of code which
-// needs to fill some form of cache before performance is of interrest.
+// needs to fill some form of cache before performance is of interest.
 // Note: results gathered within this period are discarded and not used for
 // reported result.
 BM_DEFINE_double(benchmark_min_warmup_time, 0.0);

src/complexity.h

@@ -31,7 +31,7 @@ std::vector<BenchmarkReporter::Run> ComputeBigO(
     const std::vector<BenchmarkReporter::Run>& reports);
 
 // This data structure will contain the result returned by MinimalLeastSq
-//   - coef        : Estimated coeficient for the high-order term as
+//   - coef        : Estimated coefficient for the high-order term as
 //                   interpolated from data.
 //   - rms         : Normalized Root Mean Squared Error.
 //   - complexity  : Scalability form (e.g. oN, oNLogN). In case a scalability

src/console_reporter.cc

@@ -115,7 +115,7 @@ static std::string FormatTime(double time) {
   if (time < 100.0) {
     return FormatString("%10.1f", time);
   }
-  // Assuming the time ist at max 9.9999e+99 and we have 10 digits for the
+  // Assuming the time is at max 9.9999e+99 and we have 10 digits for the
   // number, we get 10-1(.)-1(e)-1(sign)-2(exponent) = 5 digits to print.
   if (time > 9999999999 /*max 10 digit number*/) {
     return FormatString("%1.4e", time);

src/perf_counters.cc

@@ -68,7 +68,7 @@ PerfCounters PerfCounters::Create(
       return NoCounters();
     }
     attr.disabled = is_first;
-    // Note: the man page for perf_event_create suggests inerit = true and
+    // Note: the man page for perf_event_create suggests inherit = true and
     // read_format = PERF_FORMAT_GROUP don't work together, but that's not the
     // case.
     attr.inherit = true;

src/statistics.h

@@ -22,9 +22,10 @@
 
 namespace benchmark {
 
-// Return a vector containing the mean, median and standard devation information
+// Return a vector containing the mean, median and standard deviation
-// (and any user-specified info) for the specified list of reports. If 'reports'
+// information (and any user-specified info) for the specified list of reports.
-// contains less than two non-errored runs an empty vector is returned
+// If 'reports' contains less than two non-errored runs an empty vector is
+// returned
 BENCHMARK_EXPORT
 std::vector<BenchmarkReporter::Run> ComputeStats(
     const std::vector<BenchmarkReporter::Run>& reports);

src/sysinfo.cc

@@ -441,7 +441,7 @@ std::string GetSystemName() {
   return str;
 #else
 #ifndef HOST_NAME_MAX
-#ifdef BENCHMARK_HAS_SYSCTL  // BSD/Mac Doesnt have HOST_NAME_MAX defined
+#ifdef BENCHMARK_HAS_SYSCTL  // BSD/Mac doesn't have HOST_NAME_MAX defined
 #define HOST_NAME_MAX 64
 #elif defined(BENCHMARK_OS_NACL)
 #define HOST_NAME_MAX 64

tools/gbench/util.py

@@ -58,7 +58,7 @@ def classify_input_file(filename):
     """
     Return a tuple (type, msg) where 'type' specifies the classified type
     of 'filename'. If 'type' is 'IT_Invalid' then 'msg' is a human readable
-    string represeting the error.
+    string representing the error.
     """
     ftype = IT_Invalid
     err_msg = None