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Add a simple ASCII conversion test and benchmark

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Run `fish_tests perf_convert_ascii` to run the benchmark.
This commit is contained in:
ridiculousfish 2020-09-19 14:04:47 -07:00
parent a3e20a4d38
commit 4d5d90d828
1 changed files with 50 additions and 3 deletions
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53
src/fish_tests.cpp
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@ -94,11 +94,12 @@ static int s_test_run_count = 0;
// Indicate if we should test the given function. Either we test everything (all arguments) or we
// run only tests that have a prefix in s_arguments.
static bool should_test_function(const char *func_name) {
// No args, test everything.
// If \p default_on is set, then allow no args to run this test by default.
static bool should_test_function(const char *func_name, bool default_on = true) {
bool result = false;
if (!s_arguments || !s_arguments[0]) {
result = true;
// No args, test if defaulted on.
result = default_on;
} else {
for (size_t i = 0; s_arguments[i] != NULL; i++) {
if (!std::strncmp(func_name, s_arguments[i], std::strlen(s_arguments[i]))) {
@ -518,6 +519,50 @@ static void test_convert() {
}
}
/// Verify that ASCII narrow->wide conversions are correct.
static void test_convert_ascii() {
std::string s(4096, '\0');
for (size_t i = 0; i < s.size(); i++) {
s[i] = (i % 10) + '0';
}
// Test a variety of alignments.
for (size_t left = 0; left < 16; left++) {
for (size_t right = 0; right < 16; right++) {
const char *start = s.data() + left;
size_t len = s.size() - left - right;
wcstring wide = str2wcstring(start, len);
std::string narrow = wcs2string(wide);
do_test(narrow == std::string(start, len));
}
}
// Put some non-ASCII bytes in and ensure it all still works.
for (char &c : s) {
char saved = c;
c = 0xF7;
do_test(wcs2string(str2wcstring(s)) == s);
c = saved;
}
}
static void perf_convert_ascii() {
std::string s(128 * 1024, '\0');
for (size_t i = 0; i < s.size(); i++) {
s[i] = (i % 10) + '0';
}
(void)str2wcstring(s);
double start = timef();
const int iters = 1024;
for (int i=0; i < iters; i++) {
(void)str2wcstring(s);
}
double end = timef();
auto usec = static_cast<unsigned long long>(((end - start) * 1E6) / iters);
say(L"ASCII string conversion perf: %lu bytes in %llu usec", s.size(), usec);
}
/// Verify correct behavior with embedded nulls.
static void test_convert_nulls() {
say(L"Testing convert_nulls");
@ -6021,6 +6066,8 @@ int main(int argc, char **argv) {
if (should_test_function("escape")) test_escape_quotes();
if (should_test_function("format")) test_format();
if (should_test_function("convert")) test_convert();
if (should_test_function("convert_ascii")) test_convert_ascii();
if (should_test_function("perf_convert_ascii", false)) perf_convert_ascii();
if (should_test_function("convert_nulls")) test_convert_nulls();
if (should_test_function("tokenizer")) test_tokenizer();
if (should_test_function("fd_monitor")) test_fd_monitor();