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perf(map): visit only one hash bucket instead of all, like an actual hash table

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bfredl 2022-06-23 15:39:26 +02:00
parent 3a4fa22bad
commit 614fd3a883
1 changed files with 12 additions and 10 deletions
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22
src/nvim/mapping.c
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@ -635,16 +635,18 @@ static int buf_do_map(int maptype, MapArguments *args, int mode, bool is_abbrev,
// "bar" because of the abbreviation. // "bar" because of the abbreviation.
for (int round = 0; (round == 0 || maptype == 1) && round <= 1 for (int round = 0; (round == 0 || maptype == 1) && round <= 1
&& !did_it && !got_int; round++) { && !did_it && !got_int; round++) {
// need to loop over all hash lists int hash_start, hash_end;
for (int hash = 0; hash < 256 && !got_int; hash++) { if (has_lhs || is_abbrev) {
if (is_abbrev) { // just use one hash
if (hash > 0) { // there is only one abbreviation list hash_start = is_abbrev ? 0 : MAP_HASH(mode, lhs[0]);
break; hash_end = hash_start + 1;
} } else {
mpp = abbr_table; // need to loop over all hash lists
} else { hash_start = 0;
mpp = &(map_table[hash]); hash_end = 256;
} }
for (int hash = hash_start; hash < hash_end && !got_int; hash++) {
mpp = is_abbrev ? abbr_table : &(map_table[hash]);
for (mp = *mpp; mp != NULL && !got_int; mp = *mpp) { for (mp = *mpp; mp != NULL && !got_int; mp = *mpp) {
if ((mp->m_mode & mode) == 0) { if ((mp->m_mode & mode) == 0) {
// skip entries with wrong mode // skip entries with wrong mode