[bug #63650] Performance regression with EXPORT_ALL_VARIABLES enabled

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?63650>

                 Summary: Performance regression with EXPORT_ALL_VARIABLES
enabled 
                 Project: make
               Submitter: None
               Submitted: Fri 13 Jan 2023 12:33:13 PM UTC
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.4
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None


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Follow-up Comments:


-------------------------------------------------------
Date: Fri 13 Jan 2023 12:33:13 PM UTC By: Anonymous
On fresh Arch Linux make takes 3.5s for the following makefile.


.EXPORT_ALL_VARIABLES:

AAA = $(shell echo 1)
AAB = $(shell echo 2)
AAC = $(shell echo 3)
AAD = $(shell echo 4)
AAE = $(shell echo 5)
AAF = $(shell echo 6)

slow:
        echo ${AAA}
        echo ${AAB}
        echo ${AAC}
        echo ${AAD}
        echo ${AAE}
        echo ${AAF}


Version: GNU Make 4.4
This reproduces with make compiled from sources from ftp.gnu.org.
The issue is not present in make 4.3.

make -d prints many lines like

Makefile:4: not recursively expanding AAB to export to shell function
Makefile:5: not recursively expanding AAC to export to shell function
Makefile:6: not recursively expanding AAD to export to shell function









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