Stowage/cpython
2
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-11-03 23:21:29 +00:00
Code Issues Projects Releases Packages Wiki Activity

suggestions.c: Improve efficiency of levenshtein_distance method (#91835)

Browse source
This commit is contained in:
Pieter Eendebak 2022-05-02 19:09:35 +02:00 • committed by GitHub
parent 341689cb85
commit feb45d0ae9
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

4
Python/suggestions.c
View file

@ -78,9 +78,11 @@ levenshtein_distance(const char *a, size_t a_size,
// Instead of producing the whole traditional len(a)-by-len(b) // Instead of producing the whole traditional len(a)-by-len(b)
// matrix, we can update just one row in place. // matrix, we can update just one row in place.
// Initialize the buffer row // Initialize the buffer row
size_t tmp = MOVE_COST;
for (size_t i = 0; i < a_size; i++) { for (size_t i = 0; i < a_size; i++) {
// cost from b[:0] to a[:i+1] // cost from b[:0] to a[:i+1]
buffer[i] = (i + 1) * MOVE_COST; buffer[i] = tmp;
tmp += MOVE_COST;
} }
size_t result = 0; size_t result = 0;