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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2018-12-15 00:39:17 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2018-12-15 00:49:16 +0100 |
| commit | 7db384338a803fc74a0e8eb62e9369e10a49ffdb (patch) | |
| tree | 3ffc6b10de2c8f9d24b5e72042fe659cfc35c86d /modutils | |
| parent | f10f17f8d3ee77c469fc57634a458e8a45aeb681 (diff) | |
| download | busybox-7db384338a803fc74a0e8eb62e9369e10a49ffdb.tar.gz | |
bc: rewrite "block flag stack" using simple realloc'ed byte array
Each access to current top flag took a function call + fetch of three data items
+ multiplication and some additions + and then following the resulting pointer.
After the change, it is: fetch pointer value + one byte access via this pointer.
function old new delta
bc_parse_startBody 45 49 +4
bc_parse_free 46 47 +1
zbc_parse_auto 188 185 -3
bc_parse_push 14 11 -3
bc_vm_run 398 394 -4
zbc_vm_process 63 58 -5
zdc_parse_expr 638 632 -6
zbc_parse_body 101 95 -6
bc_parse_addFunc 31 25 -6
bc_parse_noElse 56 48 -8
zcommon_parse 341 331 -10
zbc_parse_else 134 123 -11
bc_parse_create 124 108 -16
zbc_parse_text_init 123 104 -19
zbc_parse_endBody 292 252 -40
zbc_parse_stmt 1479 1420 -59
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/14 up/down: 5/-196) Total: -191 bytes
text data bss dec hex filename
979880 485 7296 987661 f120d busybox_old
979689 485 7296 987470 f114e busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'modutils')
0 files changed, 0 insertions, 0 deletions