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DocShell/Fastback: Difference between revisions
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This algorithm is inefficient (O(n²)) in the worst case, but O(n) in the common case, since we'll rarely need to evict more than one viewer -- only if the user manually changes the pref that controls the limit. There is a fast path for "clear history" which evicts all cached viewers in O(n) time. | This algorithm is inefficient (O(n²)) in the worst case, but O(n) in the common case, since we'll rarely need to evict more than one viewer -- only if the user manually changes the pref that controls the limit. There is a fast path for "clear history" which evicts all cached viewers in O(n) time. | ||
The global limit can be overridden with the <code>browser.sessionhistory.max_total_viewers</code> pref. The default value of -1 computes a limit based on physical memory as described above. Any other value acts as the global limit, with 0 disabling caching entirely. The per-SHistory limit is defined by the <code>gHistoryMaxViewers</code> constant. | |||