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http: improve response header handling, save cpu cycles

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Saving some cpu cycles in http response header processing:
- pass the length of the header line along
- use string constant sizeof() instead of strlen()
- check line length if prefix is possible
- switch on first header char to limit checks

Closes #13143
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Stefan Eissing 2024-03-18 12:46:43 +01:00 • committed by Daniel Stenberg
parent 6bd4ca0ef6
commit 522ea5420f
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5 changed files with 394 additions and 334 deletions
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2
lib/http.h
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@ -103,7 +103,7 @@ CURLcode Curl_http_target(struct Curl_easy *data, struct connectdata *conn,
CURLcode Curl_http_statusline(struct Curl_easy *data,
struct connectdata *conn);
CURLcode Curl_http_header(struct Curl_easy *data, struct connectdata *conn,
char *headp);
char *headp, size_t hdlen);
CURLcode Curl_transferencode(struct Curl_easy *data);
CURLcode Curl_http_req_set_reader(struct Curl_easy *data,
Curl_HttpReq httpreq,