Function ConstructImpl

util/memory/tempbuf.cpp:183–189

* all magick is here: * if len <= TMP_BUF_LEN. then we get prealloced per threaded buffer * else allocate one in heap */

 * else allocate one in heap
 */
static inline TTempBuf::TImpl* ConstructImpl(size_t len) {
    if (len <= TMP_BUF_LEN) {
        return AcquireSmallBuffer(len);
    }

    return new (len) TAllocedBuf();
}

TTempBuf::TTempBuf(size_t len)
    : Impl_(ConstructImpl(len))