<?php
$start_time = microtime(true);

for ($i=0; $i < 100000; $i++) { 
  $myfile = fopen("php_log.txt", "w") or die("Unable to open file!");
  $txt = "--  测试写入文件末尾注释\n";
  fwrite($myfile, $txt);
  fclose($myfile);
}

$end_time = microtime(true);
var_dump(($end_time-$start_time)*1000);

print(os.time() .. "---"..os.clock())

for i=1,1000000 do
    file = io.open("lua_log.txt", "a")
    io.output(file)
    io.write("--  测试写入文件末尾注释\n")
    io.close(file)
end

print(os.time() .. "---"..os.clock())

1624246878---0.00437
1624246884---6.618569

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/time.h>

int write_file_now(char *str);

int main(int argc, char *argv[])
{
    struct timeval tvafter,tvpre;
    struct timezone tz;

    gettimeofday (&tvpre , &tz);

    long msecond_diff = 0;
    char *write_str = "--  测试写入文件末尾注释";
    write_file_now(write_str);

    gettimeofday (&tvafter , &tz);

    msecond_diff = (tvafter.tv_sec-tvpre.tv_sec)*1000+(tvafter.tv_usec-tvpre.tv_usec)/1000; 
    printf("%ld\n", msecond_diff);
    
    return EXIT_SUCCESS;
}
int write_file_now(char *str)
{
    FILE *fp = NULL;
    fp = fopen("./c_log.txt", "w+");
    for(int i = 0;i < 10000000; i++)
    {
        fputs(str, fp);
        fprintf(fp,"\n");
    }
    fclose(fp);
    return 1;
}