Re: [I] binding/python: rust std fs is slower than python fs [incubator-opendal]

["Xuanwo (via GitHub)" <gi...@apache.org>]

Xuanwo commented on issue #3665:
URL: https://github.com/apache/incubator-opendal/issues/3665#issuecomment-1829591828

   I have the same result on with a C application:
   
   ```c
   #include <stdio.h>
   #include <stdlib.h>
   
   #define FILE_SIZE 64 * 1024 * 1024  // 64 MiB
   
   int main() {
       FILE *file;
       char *buffer;
       size_t result;
   
       file = fopen("/tmp/file", "rb");
       if (file == NULL) {
           fputs("Error opening file", stderr);
           return 1;
       }
   
       buffer = (char *)malloc(sizeof(char) * FILE_SIZE);
       if (buffer == NULL) {
           fputs("Memory error", stderr);
           fclose(file);
           return 2;
       }
   
       result = fread(buffer, 1, FILE_SIZE, file);
       if (result != FILE_SIZE) {
           fputs("Reading error", stderr);
           fclose(file);
           free(buffer);
           return 3;
       }
   
       fclose(file);
       free(buffer);
   
       return 0;
   }
   ```
   
   Result:
   
   ```shell
   #include <stdio.h>
   #include <stdlib.h>
   
   #define FILE_SIZE 64 * 1024 * 1024  // 64 MiB
   
   int main() {
       FILE *file;
       char *buffer;
       size_t result;
   
       file = fopen("/tmp/file", "rb");
       if (file == NULL) {
           fputs("Error opening file", stderr);
           return 1;
       }
   
       buffer = (char *)malloc(sizeof(char) * FILE_SIZE);
       if (buffer == NULL) {
           fputs("Memory error", stderr);
           fclose(file);
           return 2;
       }
   
       result = fread(buffer, 1, FILE_SIZE, file);
       if (result != FILE_SIZE) {
           fputs("Reading error", stderr);
           fclose(file);
           free(buffer);
           return 3;
       }
   
       fclose(file);
       free(buffer);
   
       return 0;
   }
   
   
   ```


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