Speed up translog writes by moving buffers where possible #127836
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This serves two purposes: Save allocation of pages under the lock for low write-rate translogs and also make copying large documents a little less likely.
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From all the investigating of indexing as of late :) this serves two purposes:
Save allocation of pages under the lock for low write-rate translogs and also make copying large documents a little less likely. Also it removes a dependency on
BigArrayswhich is always nice :)This really is just one small step though, there's a lot more cleanup that can (and should) happen here to avoid more copies. The current implementation literally copies each written byte at least 3 times (from the
Operationto the first buffer, first buffer to second buffer inadd, and then another round to the direct IO buffer when writing), that's just a needless waste of cycles and memory bandwidth.