[Octave-bug-tracker] [bug #40304] Excessive I/O in load function

[anonymous]

Follow-up Comment #20, bug #40304 (project octave):

In regards to comment #17, the problem occurs after saving/loading

In regards to comment #18, the problem also occurs in 3.8.0. Partial strace
is:

26796 read(0, "load Extended_Moleculen", 16384) = 23
26796 stat("Extended_Molecule", {st_mode=S_IFREG|0700, st_size=3041030, ...})
= 0
26796 stat("Extended_Molecule", {st_mode=S_IFREG|0700, st_size=3041030, ...})
= 0
26796 open("Extended_Molecule", O_RDONLY) = 3
26796 read(3, " # name: nspinn # type: scalarnt"..., 8191) = 8191
26796 close(3)                          = 0
26796 open("Extended_Molecule", O_RDONLY) = 3
26796 read(3, " # name: nspinn # type: scalarnt"..., 8191) = 8191
26796 lseek(3, 0, SEEK_SET)             = 0
26796 read(3, " # name: nspinn # type: scalarnt"..., 8191) = 8191
26796 lseek(3, 0, SEEK_SET)             = 0
26796 lseek(3, 116, SEEK_SET)           = 116
26796 read(3, "# columns: 5nt1t6t0t0t1nt2t6t0t0"..., 8191) = 8191
26796 lseek(3, 124, SEEK_SET)           = 124
26796 read(3, "s: 5nt1t6t0t0t1nt2t6t0t0t1nt3t6t"..., 8191) = 8191
26796 lseek(3, 0, SEEK_SET)             = 0
26796 read(3, " # name: nspinn # type: scalarnt"..., 8191) = 8191
26796 close(3)                          = 0
26796 open("Extended_Molecule", O_RDONLY) = 3
26796 read(3, " # name: nspinn # type: scalarnt"..., 8191) = 8191
26796 lseek(3, -8160, SEEK_CUR)         = 31
26796 read(3, "t1n # name: FermiEn # type: scal"..., 8191) = 8191
26796 lseek(3, -8156, SEEK_CUR)         = 66
26796 read(3, "t0n # name: iorbn # type: matrix"..., 8191) = 8191
26796 mmap(NULL, 425984, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f949d5ad000
26796 lseek(3, -8128, SEEK_CUR)         = 129
26796 read(3, "t1t6t0t0t1nt2t6t0t0t1nt3t6t0t0t1"..., 8191) = 8191
26796 lseek(3, -8189, SEEK_CUR)         = 131
26796 read(3, "t6t0t0t1nt2t6t0t0t1nt3t6t0t0t1nt"..., 8191) = 8191
26796 lseek(3, -8189, SEEK_CUR)         = 133
26796 read(3, "t0t0t1nt2t6t0t0t1nt3t6t0t0t1nt4t"..., 8191) = 8191
26796 lseek(3, -8189, SEEK_CUR)         = 135
26796 read(3, "t0t1nt2t6t0t0t1nt3t6t0t0t1nt4t6t"..., 8191) = 8191
26796 lseek(3, -8189, SEEK_CUR)         = 137




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