Improve buffer reuse. Check for out of memory error code #81
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Closes crazyxman#80 - simdjson_is_valid() and other PHP functions would previously return false when out of memory - Related to crazyxman#60 - other php apis (using emalloc instead) will also emit fatal errors when out of memory and end the process. Closes crazyxman#79 - reuse buffers for strings less than 1000000 bytes and 100000 depth. (Assumes the depth rarely changes in callers)
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Closes #80 - simdjson_is_valid() and other PHP functions would previously return false when out of memory
Closes #79 - reuse buffers for strings less than 1000000 bytes and 100000 depth. (Assumes the depth rarely changes in callers)
(Otherwise, create a brand new parser instance and only use that instance once, after which the megabytes of memory will be reclaimed)