foldl' forces the accumulator at each step, but only to weak head normal form. For an attrset, WHNF means "yes, this is an attrset." The values inside (i, total) stay as thunks. After 100,000 steps, each field is a chain of 100,000 deferred additions, the same pathology as the naive trampoline's non-key fields. On this machine, the C++ stack gives out around 65,000 deep. The trampoline with deepSeq handles the same workload without issue because it forces the entire state, not just its outer shape:
It's a big week for Apple. On Friday, Tim Cook revealed that the company would be announcing new products starting today, ahead of its latest Apple event on Wednesday. Rumors have been swirling about a budget MacBook, possibly with a touchscreen, as well as a new iPad and iPhone.
，这一点在新收录的资料中也有详细论述
union object_info *j = h->next;。新收录的资料对此有专业解读
But questions remain about how realistic the goal and timeframe are, given recent and steep Nasa budget cuts, and some scientists are concerned that the plans are driven by geopolitical goals.。关于这个话题，新收录的资料提供了深入分析