Can be enabled with LFS_CACHE_TRACEit will output information with LFS_DEBUG

cache trace show lots of possible caching in lfs_dir_traversecache recache for block 835 number 4938 line=1683cache recache for block 882 number 4938 line=1683cache recache for block 930 number 4938 line=1683cache recache for block 978 number 4938 line=1683testconfig    .read_size = 4,    .prog_size = 16,    .block_size = 4096,    .block_count = (8*1024),    .cache_size = 1024,    .metadata_max = 1024,        for (int i = 0; i <= 1000; i++) {                char test_path[32];                if (i > 100) {                        sprintf(test_path, "testdir/test%d", i-100);                        err = lfs_remove(&lfs, test_path);                }                sprintf(test_path, "testdir/test%d", i);                uint32_t prng = i;                lfs_size_t size = 4096 + (test_prng(&prng) & 3);                lfs_file_t file;                err = lfs_file_open(&lfs, &file, test_path,                                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC);                lfs_ssize_t res = lfs_file_write(&lfs, &file, chunk, size);                err = lfs_file_close(&lfs, &file);        }before patchtop read operation (number of flash read size, number of flash op)106060, 16976,106060, 16976,106560, 19645,107084, 16977,108820, 17624,total read/writetotal read=26174188 B write=4287328 Btotal num read=1445383 op write=7732 opafter patch15044, 4115044, 4115044, 4115044, 4116068, 42,total read=18809040 B write=4287328 Btotal num read=49477 op write=7732 op

cache trace show possible caching in lfs_dir_getslicecache recache for block 83 number 23 line=790cache recache for block 881 number 23 line=790cache recache for block 929 number 23 line=790cache recache for block 977 number 23 line=790cache recache for block 128 number 24 line=790For the same test than previous patchbefore patchtop read operation (number of flash read size, number of flash op)15044, 4115044, 4115044, 4115044, 4116068, 42total read/writetotal read=18809040 B write=4287328 Btotal num read=49477 op write=7732 opafter patchtop read operation (number of flash read size, number of flash op)15044, 4115044, 4115044, 4115044, 4116068, 42total read/writetotal read=18852728 B write=4287328 Btotal num read=45678 op write=7732 opcache recache for block 882 number 2 line=998cache recache for block 911 number 2 line=998cache recache for block 930 number 2 line=998cache recache for block 959 number 2 line=998cache recache for block 978 number 2 line=998