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- To: vim_dev@googlegroups.com
- Subject: Patch 7.3.434
- Fcc: outbox
- From: Bram Moolenaar <Bram@moolenaar.net>
- Mime-Version: 1.0
- Content-Type: text/plain; charset=UTF-8
- Content-Transfer-Encoding: 8bit
- ------------
-
- Patch 7.3.434
- Problem: Using join() can be slow.
- Solution: Compute the size of the result before allocation to avoid a lot of
- allocations and copies. (Taro Muraoka)
- Files: src/eval.c
-
-
- *** ../vim-7.3.433/src/eval.c 2012-02-05 00:39:14.000000000 +0100
- --- src/eval.c 2012-02-06 00:05:31.000000000 +0100
- ***************
- *** 442,447 ****
- --- 442,448 ----
- static list_T *list_copy __ARGS((list_T *orig, int deep, int copyID));
- static void list_remove __ARGS((list_T *l, listitem_T *item, listitem_T *item2));
- static char_u *list2string __ARGS((typval_T *tv, int copyID));
- + static int list_join_inner __ARGS((garray_T *gap, list_T *l, char_u *sep, int echo_style, int copyID, garray_T *join_gap));
- static int list_join __ARGS((garray_T *gap, list_T *l, char_u *sep, int echo, int copyID));
- static int free_unref_items __ARGS((int copyID));
- static void set_ref_in_ht __ARGS((hashtab_T *ht, int copyID));
- ***************
- *** 6571,6617 ****
- return (char_u *)ga.ga_data;
- }
-
- ! /*
- ! * Join list "l" into a string in "*gap", using separator "sep".
- ! * When "echo_style" is TRUE use String as echoed, otherwise as inside a List.
- ! * Return FAIL or OK.
- ! */
- static int
- ! list_join(gap, l, sep, echo_style, copyID)
- ! garray_T *gap;
- list_T *l;
- char_u *sep;
- int echo_style;
- int copyID;
- {
- int first = TRUE;
- char_u *tofree;
- char_u numbuf[NUMBUFLEN];
- listitem_T *item;
- char_u *s;
-
- for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
- {
- - if (first)
- - first = FALSE;
- - else
- - ga_concat(gap, sep);
- -
- if (echo_style)
- s = echo_string(&item->li_tv, &tofree, numbuf, copyID);
- else
- s = tv2string(&item->li_tv, &tofree, numbuf, copyID);
- - if (s != NULL)
- - ga_concat(gap, s);
- - vim_free(tofree);
- if (s == NULL)
- return FAIL;
- line_breakcheck();
- }
- return OK;
- }
-
- /*
- * Garbage collection for lists and dictionaries.
- *
- * We use reference counts to be able to free most items right away when they
- --- 6572,6690 ----
- return (char_u *)ga.ga_data;
- }
-
- ! typedef struct join_S {
- ! char_u *s;
- ! char_u *tofree;
- ! } join_T;
- !
- static int
- ! list_join_inner(gap, l, sep, echo_style, copyID, join_gap)
- ! garray_T *gap; /* to store the result in */
- list_T *l;
- char_u *sep;
- int echo_style;
- int copyID;
- + garray_T *join_gap; /* to keep each list item string */
- {
- + int i;
- + join_T *p;
- + int len;
- + int sumlen = 0;
- int first = TRUE;
- char_u *tofree;
- char_u numbuf[NUMBUFLEN];
- listitem_T *item;
- char_u *s;
-
- + /* Stringify each item in the list. */
- for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
- {
- if (echo_style)
- s = echo_string(&item->li_tv, &tofree, numbuf, copyID);
- else
- s = tv2string(&item->li_tv, &tofree, numbuf, copyID);
- if (s == NULL)
- return FAIL;
- +
- + len = (int)STRLEN(s);
- + sumlen += len;
- +
- + ga_grow(join_gap, 1);
- + p = ((join_T *)join_gap->ga_data) + (join_gap->ga_len++);
- + if (tofree != NULL || s != numbuf)
- + {
- + p->s = s;
- + p->tofree = tofree;
- + }
- + else
- + {
- + p->s = vim_strnsave(s, len);
- + p->tofree = p->s;
- + }
- +
- + line_breakcheck();
- + }
- +
- + /* Allocate result buffer with its total size, avoid re-allocation and
- + * multiple copy operations. Add 2 for a tailing ']' and NUL. */
- + if (join_gap->ga_len >= 2)
- + sumlen += (int)STRLEN(sep) * (join_gap->ga_len - 1);
- + if (ga_grow(gap, sumlen + 2) == FAIL)
- + return FAIL;
- +
- + for (i = 0; i < join_gap->ga_len && !got_int; ++i)
- + {
- + if (first)
- + first = FALSE;
- + else
- + ga_concat(gap, sep);
- + p = ((join_T *)join_gap->ga_data) + i;
- +
- + if (p->s != NULL)
- + ga_concat(gap, p->s);
- line_breakcheck();
- }
- +
- return OK;
- }
-
- /*
- + * Join list "l" into a string in "*gap", using separator "sep".
- + * When "echo_style" is TRUE use String as echoed, otherwise as inside a List.
- + * Return FAIL or OK.
- + */
- + static int
- + list_join(gap, l, sep, echo_style, copyID)
- + garray_T *gap;
- + list_T *l;
- + char_u *sep;
- + int echo_style;
- + int copyID;
- + {
- + garray_T join_ga;
- + int retval;
- + join_T *p;
- + int i;
- +
- + ga_init2(&join_ga, (int)sizeof(join_T), l->lv_len);
- + retval = list_join_inner(gap, l, sep, echo_style, copyID, &join_ga);
- +
- + /* Dispose each item in join_ga. */
- + if (join_ga.ga_data != NULL)
- + {
- + p = (join_T *)join_ga.ga_data;
- + for (i = 0; i < join_ga.ga_len; ++i)
- + {
- + vim_free(p->tofree);
- + ++p;
- + }
- + ga_clear(&join_ga);
- + }
- +
- + return retval;
- + }
- +
- + /*
- * Garbage collection for lists and dictionaries.
- *
- * We use reference counts to be able to free most items right away when they
- ***************
- *** 13406,13412 ****
- char_u *rhs;
- int mode;
- int abbr = FALSE;
- ! int get_dict = FALSE;
- mapblock_T *mp;
- int buffer_local;
-
- --- 13479,13485 ----
- char_u *rhs;
- int mode;
- int abbr = FALSE;
- ! int get_dict = FALSE;
- mapblock_T *mp;
- int buffer_local;
-
- *** ../vim-7.3.433/src/version.c 2012-02-05 23:10:25.000000000 +0100
- --- src/version.c 2012-02-06 00:10:23.000000000 +0100
- ***************
- *** 716,717 ****
- --- 716,719 ----
- { /* Add new patch number below this line */
- + /**/
- + 434,
- /**/
-
- --
- hundred-and-one symptoms of being an internet addict:
- 30. Even though you died last week, you've managed to retain OPS on your
- favorite IRC channel.
-
- /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
- /// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
- \\\ an exciting new programming language -- http://www.Zimbu.org ///
- \\\ help me help AIDS victims -- http://ICCF-Holland.org ///
-