From c4e556ededaff1110ced3e0a091caf83c88174f2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Skytt=C3=A4?= <ville.skytta@iki.fi>
Date: Sat, 5 Dec 2020 15:09:46 +0200
Subject: [PATCH] versions: use associative array to hold current versions
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"hyperfine pyenv-versions" before with my bash 4.4:

Time (mean ± σ):    81.7 ms ±   2.2 ms  [User: 67.8 ms, System: 15.7 ms]
Range (min … max):  78.3 ms …  87.2 ms  34 runs

After:

Time (mean ± σ):    70.6 ms ±   2.4 ms  [User: 55.6 ms, System: 16.9 ms]
Range (min … max):  67.9 ms …  78.9 ms  41 runs
---
 libexec/pyenv-versions | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/libexec/pyenv-versions b/libexec/pyenv-versions
index 019c0e90..91c99512 100755
--- a/libexec/pyenv-versions
+++ b/libexec/pyenv-versions
@@ -64,16 +64,27 @@ if [ -d "$versions_dir" ]; then
   versions_dir="$(realpath "$versions_dir")"
 fi
 
+if ((${BASH_VERSINFO[0]} > 3)); then
+  declare -A current_versions
+else
+  current_versions=()
+fi
 if [ -n "$bare" ]; then
   hit_prefix=""
   miss_prefix=""
-  current_versions=()
   include_system=""
 else
   hit_prefix="* "
   miss_prefix="  "
   OLDIFS="$IFS"
-  IFS=: current_versions=($(pyenv-version-name || true))
+  IFS=:
+  if ((${BASH_VERSINFO[0]} > 3)); then
+    for i in $(pyenv-version-name || true); do
+      current_versions["$i"]="1"
+    done
+  else
+    current_versions=($(pyenv-version-name || true))
+  fi
   IFS="$OLDIFS"
   include_system="1"
 fi
@@ -93,7 +104,9 @@ exists() {
 }
 
 print_version() {
-  if exists "$1" "${current_versions[@]}"; then
+  if [[ ${BASH_VERSINFO[0]} -ge 4 && ${current_versions["$1"]} ]]; then
+    echo "${hit_prefix}$1 (set by $(pyenv-version-origin))"
+  elif (( ${BASH_VERSINFO[0]} < 3 )) && exists "$1" "${current_versions[@]}"; then
     echo "${hit_prefix}$1 (set by $(pyenv-version-origin))"
   else
     echo "${miss_prefix}$1"