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March 8, 2012 16:28
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G-WAN / JSON parsing and rendering in a C script
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| // ============================================================================ | |
| // C servlet sample for the G-WAN Web Application Server (http://trustleap.ch/) | |
| // ---------------------------------------------------------------------------- | |
| // json_bench.c: just parsing json | |
| // | |
| // output: | |
| // On 1 single CPU Core, parsing this JSON tree 100,000 times took 624 ms | |
| // ============================================================================ | |
| #include "gwan.h" // G-WAN exported functions | |
| static char s_json[] = { | |
| "{" | |
| "\"bid_request\":{" | |
| "\"members\":[" | |
| "{" | |
| "\"id\":5" | |
| "}" | |
| "]," | |
| "\"allow_exclusive\":false," | |
| "\"debug_requested\":false," | |
| "\"tags\":[" | |
| "{" | |
| "\"id\":13," | |
| "\"sizes\":[\"728x90\"]," | |
| "\"position\":\"unknown\"," | |
| "\"inventory_source_id\": 476," | |
| "\"auction_id_64\":8984480746668973511," | |
| "\"reserve_price\":1.250," | |
| "\"tag_format\":\"javascript\"," | |
| "\"ad_profile_id\":382," | |
| "\"default_creative_id\":29," | |
| "\"tag_data\":\"page_id=242\"," | |
| "\"querystring\":\"age=21&gender=male\"" | |
| "}," | |
| "{" | |
| "\"id\":17," | |
| "\"sizes\":[\"300x250\"]," | |
| "\"position\":\"unknown\"," | |
| "\"inventory_source_id\": 300," | |
| "\"auction_id_64\":8984480746668973512," | |
| "\"reserve_price\":1.500," | |
| "\"tag_format\":\"javascript\"," | |
| "\"ad_profile_id\":389," | |
| "\"default_creative_id\":32," | |
| "\"tag_data\":\"page_id=242\"," | |
| "\"querystring\":\"age=21&gender=male\"" | |
| "}" | |
| "]," | |
| "\"bid_info\":{" | |
| "\"user_id_64\":2987961585469200312," | |
| "\"selling_member_id\":3," | |
| "\"no_cookies\":false," | |
| "\"ip_address\":\"96.246.152.18\"," | |
| "\"user_agent\":\"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US;rv:1.9.0.3) Gecko/2008092414 Firefox/3.0.3\"," | |
| "\"country\":\"US\"," | |
| "\"region\":\"NY\"," | |
| "\"city\": \"New York\"," | |
| "\"postal_code\": 10014," | |
| "\"dma\":501," | |
| "\"time_zone\":\"America/New_York\"," | |
| "\"url\":\"http://www.yahoo.com/\"," | |
| "\"domain\":\"yahoo.com\"," | |
| "\"inventory_class\":\"class_1\"," | |
| "\"within_iframe\":false," | |
| "\"total_clicks\":0" | |
| "}" | |
| "}" | |
| "}" | |
| }; | |
| int main(int argc, char *argv[]) | |
| { | |
| static char top[]= | |
| "<!DOCTYPE HTML>" | |
| "<html lang=\"en\"><head><title>Benchmarking JSON</title><meta http-equiv" | |
| "=\"Content-Type\" content=\"text/html; charset=utf-8\">" | |
| "<link href=\"/imgs/style.css\" rel=\"stylesheet\" type=\"text/css\">" | |
| "</head><body style=\"margin:16px;\"><h2>Benchmarking JSON</h2>\r\n"; | |
| xbuf_t *reply = get_reply(argv); | |
| xbuf_ncat(reply, top, sizeof(top) - 1); | |
| // ------------------------------------------------------------------------- | |
| // build JSON tree from text, and parse the new JSON tree | |
| // ------------------------------------------------------------------------- | |
| xbuf_cat(reply, "<b>Build JSON tree from text:</b><br>"); | |
| jsn_t *import = jsn_frtext(s_json, "import"); // import from text | |
| xbuf_xcat(reply, "Parsing %s.<br><br>", import ? "worked" : "failed"); | |
| // ------------------------------------------------------------------------- | |
| // re-display all in compact and formatted form (to check it works) | |
| // ------------------------------------------------------------------------- | |
| xbuf_cat(reply, "<b>JSON compact output:</b><br>"); | |
| xbuf_t xbuf; | |
| xbuf_init(&xbuf); | |
| char *text = jsn_totext(&xbuf, import, 0); // 0:compact form | |
| xbuf_xcat(reply, "<pre>%s</pre>", text); | |
| //xbuf_empty(&xbuf); | |
| //text = jsn_totext(&xbuf, import, 1); // 1:formatted form | |
| //xbuf_xcat(reply, "<pre>%s</pre>", text); | |
| xbuf_free(&xbuf); // free the xbuffer supplying memory for the 'text' ptr | |
| // ------------------------------------------------------------------------- | |
| // free the JSON tree | |
| // ------------------------------------------------------------------------- | |
| xbuf_cat(reply, "<br><b>Freeing the JSON tree:</b><br>"); | |
| jsn_free(import); | |
| xbuf_cat(reply, "Done.<br><br><br>"); | |
| // ========================================================================= | |
| // now do the same thing repeatedly amd time it | |
| // ------------------------------------------------------------------------- | |
| { | |
| #define NBR_ROUNDS 100000 | |
| u64 start = getms(); | |
| int rounds = NBR_ROUNDS; | |
| while(rounds--) | |
| { | |
| import = jsn_frtext(s_json, "import"); // import from text | |
| jsn_free(import); | |
| } | |
| start = getms() - start; | |
| xbuf_xcat(reply, "<b>Benchmarking JSON</b><br>" | |
| "On 1 single CPU Core, parsing this JSON tree %U times took" | |
| " %llU ms<br><br>", NBR_ROUNDS, start); | |
| } | |
| return 200; // return an HTTP code (200:'OK') | |
| } | |
| // ============================================================================ | |
| // End of Source Code | |
| // ============================================================================ |
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