Yep! I'm using JSMN (
https://github.com/zserge/jsmn), which is a streaming parser that visits each token sequentially, so there's only one copy of each JSON response in memory. I also avoid allocating new intermediate memory whenever possible; for example, to unescape backslashes in the JSON strings, I use a destructive loop that moves the non-backslash characters forward in memory, and truncates the string by moving the null terminator earlier in the string. Not something I'd imagine doing in most environments today, but as you said, it saves a bit of space at the expense of CPU time :)
void DestructivelyUnescapeStr(LPSTR lpInput) {
int offset = 0;
int i = 0;
while (lpInput[i] != '\0') {
if (lpInput[i] == '\\') {
offset++;
} else {
lpInput[i - offset] = lpInput[i];
}
i++;
}
lpInput[i - offset] = '\0';
}