PERF: column_arrays
Shaves a couple percent off of time_to_json_wide asv
seems fine, cna you rebase can you rebase again just to be sure getting segfaults on some builds, must be coming from the json c code.  @WillAyd anything stand out to you? Won’t be able to look or the next week or so. Have you tried running the tests under a debugger? Should break on any segfault 

https://pandas.pydata.org/docs/development/debugging_extensions.html

FWIW I personally haven’t been getting symbols to show up in the debugger when compiling with clang - not sure what caused that recently but gdb may make things easier if available to you

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> On Aug 5, 2021, at 9:55 PM, jbrockmendel ***@***.***> wrote:
> 
> ﻿
> getting segfaults on some builds, must be coming from the json c code. @WillAyd anything stand out to you?
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 mothballing to clear the queue, need to figure out why this is segfaulting on some builds