MonetDB: Dec2025 - Guess a size for the json element list based ...

[Sjoerd Mullender via checkin-list]

Changeset: 146a8f4de6ee for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/146a8f4de6ee
Modified Files:
        monetdb5/modules/atoms/json.c
Branch: Dec2025
Log Message:

Guess a size for the json element list based on input size.


diffs (37 lines):

diff --git a/monetdb5/modules/atoms/json.c b/monetdb5/modules/atoms/json.c
--- a/monetdb5/modules/atoms/json.c
+++ b/monetdb5/modules/atoms/json.c
@@ -83,19 +83,21 @@ int TYPE_json;
 static JSON *JSONparse(allocator *ma, const char *j);
 
 static JSON *
-JSONnewtree(allocator *ma)
+JSONnewtree(allocator *ma, int initsize)
 {
        JSON *js;
 
        js = ma_zalloc(ma, sizeof(JSON));
        if (js == NULL)
                return NULL;
+       if (initsize < 8)
+               initsize = 8;
        js->ma = ma;
-       js->elm = ma_zalloc(ma, sizeof(JSONterm) * 8);
+       js->elm = ma_zalloc(ma, sizeof(JSONterm) * initsize);
        if (js->elm == NULL) {
                return NULL;
        }
-       js->size = 8;
+       js->size = initsize;
        return js;
 }
 
@@ -1483,7 +1485,7 @@ JSONtoken(JSON *jt, const char *j, const
 static JSON *
 JSONparse(allocator *ma, const char *j)
 {
-       JSON *jt = JSONnewtree(ma);
+       JSON *jt = JSONnewtree(ma, (int) (strlen(j) / 10));
 
        if (jt == NULL)
                return NULL;
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