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-rw-r--r--el-exiftool.el6
1 files changed, 6 insertions, 0 deletions
diff --git a/el-exiftool.el b/el-exiftool.el
index 284064f..3bc6768 100644
--- a/el-exiftool.el
+++ b/el-exiftool.el
@@ -27,6 +27,12 @@
;; el-exiftool is an elisp wrapper around ExifTool. ExifTool supports
;; reading and writing metadata in various formats including EXIF, XMP
;; and IPTC.
+;;
+;; There is a significant overhead in loading ExifTool for every
+;; command to be exected. So, el-exiftool starts an ExifTool process
+;; in the -stay_open mode, and passes all commands to it. For more
+;; about ExifTool's -stay_open mode, see
+;; http://www.sno.phy.queensu.ca/~phil/exiftool/#performance
;;; Code: